What time frame are we probably looking at for a new series?
I think its going to be autum 2011 the earliest...they will want to wait a while to see the returns of movie merchandise, dvd/blueray, the TOS remastered bluerays etc. first. And I donīt think they will rush that decision.
Waiting until 2011 would also help them by creating a "hunger" for new Star Trek.
On the other hand trying to start a new show as soon as possible to profit from the "wake" of the movie might be a good strategy too.
Of course...since it seems Moonves hates Star Trek....we might have to wait quite a while longer then just 2 or 3 years.