If you are thinking of editing 3D, you might want to look into PrPro. As of CS5 (it's now CS 5.5), PrPro handles 3D footage, with a 3rd party utility, CineForm's NeoScene 3D. This ARTICLE will give you some links to tutorials, and articles.
No. PRE10 doesnt support 3D. Apart from Premiere Pro, you can also use After Effects for 3D