So Words With Friends chose not to make a BB app. I tried a few alternative and was not happy till I found this one. This is a great replacement. Great graphics and no bugs (that I know of so far).
It's very addictive. I used to take my wife's iPhone to play Words With Friends. Now, she is taking my BlackBerry to play Fightin' Words!
You can find it at the BB app store. Just type in "Fightin' Words" in the search section and you'll go right to it.