Any sites where u can ask Questions on Yoga postures?
Answer: go to google & search for in recent times "YOGA" you will get a million websites which will answer most od ur questions try this one also "http://www.a2zyoga.com/"
But Yoga ideally must be scholarly only with thw help out of a trained instructor for best results..
I don't know about where you can move about to ask questions, but a great site with yoga postures and details on how to do them which are greatly well written and helpful is
http://www.yogajournal.com
click on the "postures" (or is it poses?) tab! :).
Try http://www.rvita.com. Here you will find out lots of information on alternative therapy and also find out huge experts n these field including 'Yoga'. I think you should pick up a flight to Delhi where you amy find BABA RAMDEV showing some postures under some tree and that too for free..
santosha.com/asanas/sirsha.html