Right now I've been playing a lot of Plants vs Zombies at on my wifes iPad. I was thinking Mac App is Mac App, but it seems like purchasing it on iPad is different than a purchase for your Mac laptop/desktop via the MacApp store with a substantially higher price. Regardless, it's surprisingly enjoyable! I'm also thinking about Angry Birds! What has grabbed you? For reference see: Top 10 Games in Mac App Store, and Gigaom.com's Best Games on the Mac App Store Right Now.