Bunny v0.5.4 rc2 is now available from GitHub. The code is now frozen as far as new features and enhancements are concerned. Of course, if you find any critical bugs please contact me as soon as you can so that the fix can be implemented.
The changes included in the upcoming v0.5.4 release can be viewed in the Bunny wiki.
I intend to release the new gem on 5th October 2009. If anyone needs more time to evaluate the changes please let me know and I will consider deferring the release.