I'm going to predict that if this film is even moderately successful, there will be a Trek related series of some kind, premiering no later than the 2010 fall television season.
I'd bet you all the money I have that this will not happen. Not that soon. Especially if they would want to have JJ Abrams attached to a series and I doubt he would do it right now. And even CBS as a huge corporation out for all the profit it could possibly make would realize that the last Star Trek television show was cancelled for low ratings and that the same kind of reimagining that went into the new film must also be invested into any kind of new television project.
I agree. I bet a sequal movie will come out first. Then, 2011-2013 a new series.
As for the new series, I am hoping it uses an episode arch type theme. Those were the best episodes of Trek in my opinion. Where everything goes together and things are not forgetten by season 3 which happened in season 1.