We are planning next release (R4.2) in next two weeks. You could help us to achieve that milestone by updating messageset of some particular language you know well. Up-to-time versions of language packs are available at http://cvs.wackowiki.com. Send results to email@example.com.
If you want to see some feature to be included in Wacko Wiki R4, please let us know till August, 28 (ICQ:551593, email, Wakka To Do). After this date new feature requests would not be implemented in R4.
Code in Wacko CVS was severely updated. DB strusture was changed. Instruction for altering DB is published here — but there is no need of doing so unless you want to upgrade up to CVS version. Otherwise, just wait for R4.