I cant help you much myself.

I am still on 1.8.7 although lately I have almost managed to upgrade to 
1.9.x (I factored out incompatible yaml files with german umlauts. I 
don't want to be forced to use UTF-8 just because of Ruby, ISO* is fine 
for me. I can't be bothered to must-accept UTF-8).

Unfortunately I don't know if ruby-qt is still active.

Rubyforge of Qt seems to be dead. Where is QT development still 
happening? Is rdale still maintaining things?

These kind of things should go into a homepage.

For ruby-gnome, we have a homepage with lots of documentation. Ruby-qt 
could use that too.

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