From the Scrabulous page in Facebook:
Features coming soon:
Temporary score - No need to do the math before placing a word.
Tiles left - Tile tracking will be a lot easier for all players.
Improved interface - You will love it!
Dictionaries - We shall be offering more language options.
Type tiles option - Will be much faster to place the tiles on to the board.
Messaging system - New message notification icon.
I'm excited about the messaging system the most. Keep up the great work guys. Love this game.