Plugin development is slow, because the source for all the plugins
hasn't been released (so we can't get it). This is mainly because
Alcor DOES want to stop development of the current QS. There are quite
a few updates to the plugins (the ones that have been released) here:
http://code.google.com/p/blacktree-elements-public/
although you will need to compile & build them yourself.
QS is still being worked on by some of us, I think we're just about
ready for another release - there's one problem that I've found, and
if that's fixed we can probably release it as B57. It'll be available
from the google code site.
I emailed Alcor (Nicholas - the QS creator) a few days ago about
something, and when I asked how development of the 'new' QS was going
he said
"It is going well. Hopefully I'll have something to show in the next
few months."
Cryptic as ever really
Have faith in QS. It will live on!