Words by post is now compatible with iPhones, Android and WP7 with their last update. My wife has an iPhone and she downloaded it and said that it runs really well. We already got a game going and everything is responsive and fast. I believe her phone is hardware accelerated so moving around the grid is more fluid than my Focus, which tends to studder when I zoom in and move around to place the tiles.
I think instead of requesting and begging Zynga to produce WWF, just ask your iPhone buddies to download Words by Post instead and everyone will be happy in the meantime. Isn't that the sole reason why we want WWF? To play with our friends who have iPhones? At least this company got it right and not biased towards a specific platform to make this a cross platform for everyone to enjoy so kudos to them.