There have been already several 'test' releases the last few days. The last release is 'XBMC_PC 12-04-2004_2'. Changelog of this release:

* general : fixed : fullscreen mode
* general : added : auto hide mouse cursor
* setup : fixed : added option to select internal or external movie player
* my mymusic : fixed : retrieving album art didnt load all tracks
* my mymusic : fixed : retrieving album art didnt work for some albums
* my mymusic : fixed : double albums if album was located in multiple folders
* general : fixed : nasty scaling bug in the skin engine
* general : added : onscreen keyboard
* my mymusic : added : save playlist to .m3u playlist
* my video : added : manual imdb
* my pictures : added : seperate view/sort settings for root shares & folders
* Also last minute addition is calibration.
Default is a pixelratio if 1.
So on LCD monitors it will all look fine.
* But on TV's 4:3 or 16:9 you need to calibrate. The square you will see during one of the calibration steps should be peerfectly square. Measure with a ruler.
* This correction is applied on pictures, thumbnails etc.
I think it is not yet used on video.