Active Social 1.7, 1.8 and Active Forums 4.2 have been fully tested with DotNetNuke 5.5.  We are not aware of any issues at this time. 

DotNetNuke 5.5 has been in beta for over a month and it is obvious that the DNN Team is going to make this a fantastic release.  I have been very impressed with the DNN 5.5 Beta releases.  I don't have any real numbers yet, but I think 5.5 is going to perform much better than any other release.  This could be the release that makes you say goodbye to that old site DotNetNuke 4.9.5 site.

I will share more details once the final release of DotNetNuke 5.5 is made available.