Many thanks for your interest in the buzztrax software. The latest version are quite usable already. There are still lots of planned features. If you miss something come back from time to time to read about the status or subscribe to the users mailing list to get informed about changes (there is a monthly news update on the list).
For the fearless, you can check out the current sources from GIT. Details about how to do that and about how to compile them can be found on the 'Building' page. If you have any problems building the project, please let us know (mail us, talk to us on irc or submit a bug report).