Release Candidate #3 (RC3) is available at:
http://maven.exadel.com/org/richfaces/richfaces/3.0.1-SNAPSHOT/richfaces-3.0.1-20070514.233235-51-bin.zip

The lib folder contains two jar files. One for Ajax4jsf and one for RichFaces libraries. Note, that starting from Ajax4jsf 1.1.1, the oscache library is not required to be in the classpath anymore.