Goodness, you have quite a number of replies! If you're still looking for additional options, I would recommend Lotus Fleet. As the RP Administrator for the fleet, and having served within the fleet since Cryptic's announcement that they would be taking on Star Trek Online, I can tell you that we offer maturity, flexibility, the ability to contribute, and a strong camaraderie. Our primarily forum-based RP is strong and thriving, with people who are very willing to help you "learn the ropes" with regards to RPing. We're looking to launch our latest starship, which will join a fleet of five existing starships and one starbase whose command crews are entirely player run.
Our Fleet Admiral is Nova, a consistent contributor to the Star Trek podcast Hailing Frequency, and we offer an extensive 4 year Academy free to anyone who wishes to use it. At the end of the Academy we issue diplomas are unique, printable, and best of all would not look out of place at all framed on your wall with other degrees or certifications. If you're interested in us, you can have a look over at http://www.lotusfleet.com
Whatever your choice (and you do have several good ones to look through here!), I wish you well.
Good luck and take care,
Captain Caltern / Impulse-A