I'm not sure if you want it because it isn't entirely ported (I didn't get to add the twitter artifactories back in), but I managed to get Kestrel compiling with sbt 0.11.
Moved to use sbt 0.11
mccv is working at porting standard-project over to sbt 11, so there may be a light at the end of the tunnel here soon...
(hope i didn't jinx it.)
ok! release_2_2 and release_3_0 branches are now using sbt 11.