Its confirmed, Star Trek Online will be free to play later this year:
"Cryptic is working on the free-to-play model for Star Trek Online," Perfect World Entertainment's CEO, Kelvin Lau
Any more details, I do not know but this was predictable. The way I see it, any game that offers a life time sub is going to go free to play. This is because once your lifers have reached a certain point then they become leeches and aren't adding to profits.
I just hope they do the free to play model right. I am happy to pay a sub to that game but it has to be worth it.