> Will Production Assistant be compatible with the new vegas 10?
Yes, for the most part. You may have to rebuild some of your render presets because Sony changed some of the renders but other than that it should work fine.
Note that the newly announced Vegas Pro Production Assistant 2 will have a lot more capabilities so you may want to take advantage of the very reasonable upgrade offer.
(In the interest of "full discloser" I work for VASST which develops Production Assistant for Sony) ;-)