If you're familiar with Fruit Ninja for the iPhone/iPad/iPod touch, then you'll recognize Ninja Kaka -Fruit Dojo immediately. It isn't quite on the same level as its iOS 4 counterpart, but the Android game is nicely done and an entertaining way to spend a spare minute or two. The concept (slicing fruit with a "sword") sounds stupid and the gameplay may seem lame at first, but the app is fun and surprisingly addictive once you give it a chance.
A quick warning: don't show this game to your children (and possibly your girlfriend or wife) if you ever want to see your EVO again. My 9-month-old daughter loved Fruit Ninja before she could crawl, so Ninja Kaka was an instant hit with her.