I am, I'm using an 04 Norco Evolve. its f*cking light-the 03 weighs 3.9 lbs just as a frame, and the 04 is 7.something with fork and headset. Thats all i know from my research.
and my buddy built up an 05 moment i think. and its amazing light.
Sidekick would blow for trials. Trust me, I rode a year on a trailstar. On a 420-400mm fork you're FIGHTING! to keep the front end up. Decent starter for me... but I wouldn't recommend one for anybody. Keep street dedicated frames to street since they're meant for higher forks.
Czar has a street frame now. +10mm bb, seat post, I think 1070 wheel base. If you can find an 04 echo pure those are awesome street/trials frames. And there are tons of others. Just keep the bb around 0mm, nothing below which a street frame will put you. Your pedal kicks will suffer.
or i could build you a frame to your specs and sell it to you. it wouldnt be as expensive as thoes other frames, i guarantee! and the one i built myself is extremely nice for street and trials, especially with the 24s.