I installed ToB, and i have recently started a new game in SoA, with the new Watcher's Keep Area. I finished it many time in ToB, but never in SoA, so the question is: if i finish it in SoA will it still be available in Tob. This is mosly for Sarevok, because Watvher's Keep means a lot of xperience for everyone, and if finish it in SoA i fear that Sarevok will be left behind, because he won't have enough xp compared to the others. Pls HELP!

the question:
"so the question is: if i finish it in SoA will it still be available in Tob"
the answer:
No. I mean it'll be on the map, but when you visit it it'll be in the state in what you left it in SoA. WK provides enormous xp in SoA. I don't know if it is the same in ToB. The place is a 'test' for your pary and tactic - serious one.

<font color="gold">...but then again, Sarevok starts out with 2700000 XP or so, so if you're running a full party, your levels won't be much higher than that anyway. ;) </font>

with watchers keep beaten, the levels will be quite a lot higher.

It depends on where you are in the game on the Exp. you gain from Watcher's Keep. If you beat it in SoA, then yes you'll gain a lot of experience points, you still can in ToB but like I said it depends when you do it. If it's late in ToB, you won't gain that much experience, but enough to gain a couple of levels. I wouldn't worry about Sarevok dragging in Throne of Bhaal because even when you get him, he is a very powerful fighter so levels shouldn't be much of a problem for him.