We have mailinglists (
http://lists.roundcube.net), we don't read those forums often. Remember, RoundCube is a web
mail?
I also idle on our Freenode channel a lot - #roundcube.
In general, yeah, it stalled and everyone is busy. But for example right now we are working on merging branches to continue with PHP5 and plugin API and generally release more often. But of course I have no ETA whatsoever on this since this is a voluntary effort. But we are not going away.
On a sidenote, I got published this month in php|architect writing about RoundCube and what have planned for the future.
http://www.phparch.com/c/magazine/author/206Cheers,
Till