It has now been almost two years since the development of RichFaces ended, however since people are still using it I just want to clear up a few things.
The showcases were down earlier this year, I had to switch hosting and it didn't go as smoothly as expected. showcase.richfaces.org is now back up and should hopefully remain so for at least another year. Showcase for RF 3 is however not coming back, if you want to use it you will have to deploy it locally; it's just not feasible for me to get it up and running. I found out the demos that were hosted at exadel.com are now also down but I have no control over those.
JIRA, forums and other things
As far as I know there are no plans to shut down the current "infrastructure" (JIRA, source repositories, this whole site). That said I do not recommend using the JIRA, I'm generally ignoring it. If you want to get a hold of me the forum is the best place to do it. You can also try the RichFaces Twitter but I don't check it that often.
That's about it. Should things change I'll post an update. If you have any questions ask in the comments.