What is a Scrabble type game for Windows Phone and Iphone?

I want to play a game like Words with Friends or Scrabble. I have Windows Phone 7 and the person I want to play with has an Iphone. Is there a game like this that allows a person with WIndows Phone to play against a person with an Iphone?|||Words by Post is available for WP7, IPhone and Android.|||As of right now Words With Friends is not compatible on the Windows Mobile platform. Sorry.|||Words With Friends.