One of the main open source competitors to OpenLayers, Leaflet 0.4.5 has been released and they share their plans for version 0.5.
From the announcement: "Highlights of things already implemented in the master branch include touch interaction support for IE10 touch devices and Metro apps and a more smooth and responsive panning inertia. Follow the full changelog for more details. We’re also in the process of a major refactoring of vector rendering code to allow much simpler extension of base functionality with custom shapes, additional rendering systems (like WebGL in addition to existing SVG/VML and Canvas renderers), easy switching between renderers, also making the code simpler and easier to understand. The same goes for projection-related code to make using Leaflet with non-standard projections easier, inluding plain projections for game and indoor maps."

The project that initially emerged from Autodesk and became MapGuide Open Source just released its version 2.4.
I haven't found a summary of the changes so far. There seems to be numerous improvements to MapGuide OS's core, to Fusion Tools and FDO. Here's what looks like their list of major new items:
My main question when MapGuide Open Source comes to my mind: what's the status of its adoption? I had a lot of hopes for it when Autodesk made MapGuide open source along with providing the financial support for OSGeo's birth, but it seems like MapGuide does not get much love nowadays, at least not as much as competing solutions like GeoServer and MapServer. Any comments?

The Cartography and Geovisualization Group at Oregon State University has been experimenting with ways to improve web mapping. An OSU summary page explains the current situation:
"Today's web maps (such as those by OpenStreetMap, Google, Bing, or Yahoo!) have two major shortcomings.(1) They use the Mercator projection for all scales and for all locations, and(2) they only provide pre-rendered views for a series of predefined scales."
Almost a week ago, one of the most popular web mapping server engine has been updated, GeoServer 2.2 has been released. As they wrote: "The release of a new major version update is a big deal (the last one was over 16 months ago) [...]", here's some of the highlights, follow to link to get the full overview!
And much much more...

Amazon just announced the release of Amazon Maps API beta.
[Editor's addition] From the Amazon blog entry: "When we announced Kindle Fire HD, we also made the Amazon Maps API available to our developer community. The Amazon Maps API makes it easy for you to integrate mapping functionality into apps that run on the all-new Kindle Fire and Kindle Fire HD. These new devices will also support location-based services through the android.location API. The Amazon Maps API provides a simple migration path for developers who are already using the native Google Maps API on Android. "

Many sources pointed to the excellent article from Brian Timoney named How the Public Actually Uses Local Government Web Maps: Metrics from Denver.
Here's the metrics, but head to the article to understand the context and get the informative details:
[...] What’s clear to me is what local government maps need is less GIS and a lot more user-friendly auto-complete and SEO. Because in the end users want search and retrieval to work for maps the way it works for the rest of the web."
Here's the recent geonews in batch mode. It excludes Esri-related geonews since I wait for the conclusion of the User Conference to share an aggregated entry. Also to note, this week some of our users finally get our daily newsletter in their inboxes after an absence of over a year - the problem was that it was identified as 'spam' by a 3rd party filtering system - thanks to the user who reported this issue!
On the open source front:
On the Microsoft front:
Discussed over Slashdot:
In the miscellaneous category:
In the maps category:
I'm on holiday, but I saw this discussion over Slashdot named Great Open Source Map Tools For Web Developers.
Their summary: "InfoWorld's Peter Wayner surveys the rich ecosystem of free maps, free data, and free libraries that give developers excellent alternatives to Google Maps. 'The options are expanding quickly as companies are building their own databases for holding geographical data, their own rendering tools for building maps, and their own software for embedding the maps in websites. ... Working with these tools can be a bit more complex than working with a big provider like Google. Some of these companies make JavaScript tools for displaying the maps, and others just deliver the raw tiles that the browsers use to assemble the maps. Working with the code means making decisions about how you want to assemble the pieces — now within your control. You can stick with one simple library or combine someone else's library with tiles you produce yourself.'"
Like APB pointed out, the linked article got a few things wrong, like "OSGeo is a collection of open source packages for creating maps and displaying them in browsers."
A critical need among map users is usually due to annotations and redlining. People want to take notes and share maps easily. This is more and more a need in a social network driven timeframe.
Notemap.it has been developed aiming at this. It is a small webGIS designed to draw lines and polygons on the map, with customized style. It also let the user to add markers, notes, icons and more. Once the maps has been saved a sharable personal URL is given back to the user. Notemap is built upon OpenStreetMap, OpenLayers and Dojo.
Notemap.it: http://www.notemap.it
A brief explanation of the concept can be found at: http://www.notemap.it/free-redlining/
Just announced, the popular open source library OpenLayers version 2.12 has been released.
From the announcement: "OpenLayers 2.12 offers great new features and improvements in various areas:
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