What does my "rank" mean and how do I get to the next level?

All StarTrek.com users begin as an Ensign when they register. Users can improve their rank by actively participating in various sections of the site. The level of each user is determined by the number of message board posts, the number of images uploaded to the galleries, and the number of comments on the site. The more activity generated by the user, the higher rank they will achieve -- climbing from Ensign to Lieutenant, Commander, Captain, Commodore, and Admiral.

Who will be the first to achieve Fleet Admiral status?