For posting:
- invitations to games (you can also use the New Game menu)
- information about upcoming tournaments
- discussion of games (please limit this to completed games or discussion on how a game has arrived at a certain position ... speculation on who has an advantage or the benefits of potential moves is not permitted)
- links to interesting related sites (non-promotional)
stalemate is possible, though unlikely. Eg white king on b2, Black king on a2, queen on b1, another queen somewhere. White to move, if white moves to a1 and black moves the other queen to b2, white is stalemated. Black would have to be pretty dense to do that though!