There are also a couple of others which are not mentioned on the FAQ pages:
Red Spinning Star
: e.g User 87257
(Helden - the most active player on the site)
Given to any subscriber who makes more than 100,000 moves.
There has been talk of a new star for when anyone who reaches 500,000 or 1million moves but I dont this has been added as yet (no real point till Helden gets close I suppose
: e.g User 1
(Russ - owner/creator and all round master of this site)
If i remember right, these guys contributed money to the site before subscriptions were available and they have a special star to show that they have supported the site from the begining (or at least from very early on).
There may be others but I if so, I'm not sure what or why.