Beta builds for 0.6.0 (currently 0.5.901) have been put up. I'm not going to do a full release announcement for betas but they're are a large number of changes.
If you do want to do some betaing one thing to note is the preferences file has moved to a new location and upon first run you will not have any of your previous settings. Dictionaries have also moved.
Meme has also completly rewritten the
user guide. I suggest reading it to become familiar with the changes as it covers them pretty well. Also, it needs some eyes looking at it too.