As you may recall the notMac Challenge was a contest to produce a free method to duplicate most of the functionality of Apple's .mac, with the winner receiving upwards of $8k from various contributors. A few days ago we mentioned that Ben Spinks had posted a possible solution and that it had been released for testing. Yesterday the Challenge sponsor declared that the Ben had in fact won the challenge and would be receiving the prize. As per the rules of the contest Ben's solution, based on his commercial cross-platform CrushFTP product, will be released as open source freeware. A SourceForge repository has already been set up, and the notMac binary is available for download (dmg link).
Some loose ends still remain to be tidied up (particularly in documentation and installation), but Ben's solution "appears to be functioning perfectly for most users." So if you have a spare Mac to run as a server, this looks like it could be a great way to get most of the .mac functionality without forking over the cash to Apple.