Hi there,
Infrae has just released Silva 0.9.1. Since the beta we've put in quite a number of bugfixes. Thanks for all the feedback!
You can find Silva 0.9.1 here:
http://www.zope.org/Members/faassen/Silva
We've also released a bugfix version of Groups (0.3.1), here:
http://www.zope.org/Members/faassen/Groups
Regards,
Martijn