Bugs ordered by importance:

* No verification of user moves.

* No scoring of user moves.

* Can't handle players that are unable to move.

* Could need a few more comments.

* Crappy interface. Should really be client-server based via sockets,
  and have a nice GUI.

* Blanks don't count the blank score once placed, but the score of the
  tile they stand for. Workaround: set letter multiplier to 0. Need to
  fix next bug first, though.

* The Bot doesn't take into account the rotation of the bord for boni,
  but it works anyway since the layout is symmetric :)

* The scoring doesn't count existing tiles in line with the laid word.

* AI doesn't do any lookahead, just greedy.