T3CH released a new CVS compile of XboxMediaCenter(homebrew database).
This T3CH-compile is a complete snapshot of what is in CVS at the time the build was compiled, with just a few small additions.
XBMC is in a FEATUREFREEZE at the moment.

Here's the added/changed/updated stuff from the changelog since the 2006-04-27 T3CH CVS release:
* added: "Safe mode" key combination (WHITE + Y) on startup to invoke the fatal error handler (gives FTP access). Thanks to Bizzeh.
* added: Direct3d Setviewport export for dlls.
* added: manual allmusic button to my music.
* updated: lame to version 3.97beta2 (system/cdrip contains the updated dll)
* changed: Cleaned up the video assigning code. Video thumbnails are now stored in UserData/Thumbnails/Video.
* changed: Cleaned up the IMDb thumb code a little. GetThumb from the Movie Information page now allows users to select between the IMDb thumb and their local thumbs.
* changed: Thumbs in My Videos are set via a background loader.

* changed: Cleaned up the IMDb thumb code a little. GetThumb from the Movie Information page now allows users to select between the IMDb thumb and their local thumbs.
* changed: Thumbs in My Videos are set via a background loader.
* changed: IMDb thumbs are now cached in the usual method (no need for the separate imdb folder). Will require rescanning.
* changed: Removed logpath tag. By default it logs in the XBMC folder, unless it's running off DVD, where it logs in TDATA. UserData is also moved to TDATA if running off DVD.
* changed: Moved albums/ and thumbs/ folders to UserData/ folder.
* changed: Moved more settings from XBoxMediaCenter.xml. External DVDPlayer and Dashboard to GUI settings.
* changed: Added UserData/AdvancedSettings.xml loading ability, and moved a bunch of XBoxMediaCenter.xml settings into it.
* changed: Animation attributes can use float coordinates instead of just integer coordinates.
* changed: my weather location selector id=3 can now be a select button.
* changed: cd-ripper's lame encoder now uses --vbr-new for ripping in vbr mode
* changed: cd-ripper now writes unicode tags
* changed: FATX filename shortening now makes sure to keep important numbers such as .partXXX.rar, CD2.avi in filenames (for FTP uploads to xbox, etc.)
* changed: Keymap settings - Keyboard users have more control over fullscreen info. Changes also mean remote,gamepad,keyboard users have consistent buttons on all fullscreen media.
d.
* changed: Music OSD keymap - CodecInfo & MusicInfo changed from global to local settings (Gamepad / Remote). Slidehow keymap fixed changed from 'Info' to 'CodecInfo' (Gamepad / Keyboard).
* changed: Slideshow keymap - Info button on remote now correctly shows image information.
* changed: music info is now loaded via a thread, result is a smoother gui while loading and better ability to cancel
* changed: removed playing of start.wav, this can be done via startup.xml on window init
* changed: visualisation preset and lockstate are now remembered between windows and sessions.
* changed: Stack button can now be a radiobutton.
* changed: B in now playing should return to My Music. Back in Slideshow should stop the slideshow.
* changed: Reverted the XBE title commit earlier. They're now back to reading as UTF16 as they should be.
* changed: removed the 'search imdb' item from context menu since it's not contextual. use the button on the left instead.
* changed: XBE titles are now converted from string charset, rather from UTF16.
* changed: Playlists location is now a bookmark in Music and Videos.
* changed: switched info/title remote mappings in visualisation window.
* changed: volume up/down/mute mapped to remote 3/6/9 in keymap.
... rest of changelog (including many fixes).

Noteworthy, XML and Script changes in this build:
* Please note: Support for skins with versions 2.0 has been removed
* I include a working modded QuickTimeBrowser script, I also enabled the background in the script.
* There's some -MAJOR- changes this time, Team XBMC has started to move towards a new setting system. I can't explain it all here, but I can say this much - you will have to move some of your old folders, if you don't want to start fresh.
I suspect there will be even more changes soon, so you might want to wait with upgrading till things stabilizes a bit.
Music and Video libraries may need rescanning to get the thumbs.
More info here and here
* Keymap.xml: Slideshow keymap - Info button on remote now correctly shows image information. Music OSD keymap - CodecInfo & MusicInfo changed from global to local settings (Gamepad / Remote). Slidehow keymap fixed changed from 'Info' to 'CodecInfo' (Gamepad / Keyboard). Keymap settings - Keyboard users have more control over fullscreen info. Changes also mean remote, gamepad, keyboard users have consistent buttons on all fullscreen media.
* XboxMediaCenter.xml: Many settings have been removed. Some are now in UserData/AdvancedSettings.xml (user created file)

Keep in mind this is a CVS snapshot of the current development tree. It's not an official (stable) point release. Use only if you know what you are doing.

Official Site: http://www.xboxmediacenter.com