Long story short on the evo 4g I was able to get around 50 H/s. That's not alot, I can see why no-one bothered to bring mining to android. I haven't tried modifying the JMiner code, but if anyone has any experience in this, is it even worth it? The hardware has got to be able to put out more than i'm getting here.
If anyone's interested tweaking with the settings or maybe they'll have better speeds it's up on market, I haven't put up the source-code yet but it's available to anyone who wants it. It's under LTCMiner on play.