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According to the Brightkite blog, yesterday evening 3rd party developer Chris Hallgren opened the source code for his Brightkite BlackBerry application (Brightberry). Denver-based Brightkite is best known as the mobile social application that integrates with Facebook and Twitter to let users check in, find friends and discover the history of the places they frequent.

Dimdim announced the fifth major release of their easy, installation-free* and open-source web meeting application today. Dimdim version 5 brings a number of improvements to the platform, including significantly improved screencasting, availability of trusted SSL session security, webinar widgets, synchrolive co-browsing, performance improvements across the board, and new reporting options. Some of these new features are exclusive to the Pro tier. To this end, Dimdim has moved all Pro accounts to a new, more powerful server farm, and is now offering a monthly payment option as well, both "at a fraction of the cost" of the competitors, according to Dimdim Chief Marketing Officer Steve Chazin.

Whenever you buy an airline ticket or book a hotel room these days, chances are that a good part of that transaction will run through Sabre's network. Sabre is one of the world's largest suppliers of technology solutions for the airline and travel industry. What you may not be aware of, however, is that Sabre has made open-source software a cornerstone of its technology strategy. Sabre already relies on a number of open-source projects to handle thousands of transactions every second, and today, Sabre and Progress FUSE announced a new partnership that will make a number of FUSE's open-source offerings a cornerstone of Sabre's technology.

Two year old life-story repository Dandelife seemed to have everything going for it. It launched to praise from some of the biggest tech blogs on the web, it built a wildly loyal user base and its company advisory board was stocked with some of the biggest names in social media. Apparently that hasn't been enough, though. Last night Dandelife founder Kelly Abbott announced that the software will be made open source this year, acknowledging that the company hasn't grown or made money and that he made some important mistakes from the start.

It's an interesting story that other entrepreneurs can learn from and Abbott has done a real service in opening up honestly about what's going on at Dandelife.