I've just created the rel_0_9_0 ser cvs branch. This release is a testing release, is not meant to replace stable (yet). So don't switch all your productions systems to it :-)
When we'll get confident enough we'll have a new stable release from this new branch.
You can either download a source tar.gz from ftp://ftp.berlios.de/pub/ser/0.9.0/src/ or use cvs: cvs -d:pserver:anonymous@cvs.ser.berlios.de:/cvsroot/ser co -rrel_0_9_0 sip_router
cvs is recommended since you'll get all the bug fixes (the tar.gz will not be updated so often).
Unfortunately the documentation has not been updated yet. See NEWS for a very brief description of what changed (http://cvs.berlios.de/cgi-bin/viewcvs.cgi/ser/sip_router/NEWS?rev=1.38&o... ).
Andrei