If you haven't tried this yet it's one I would definitely recommend. It's available in the market with a hit hamster add on. Give it a go.
http://www.appbrain.com/app/cn.mobgo.lockgo
http://www.appbrain.com/app/cn.mobgo.lockgo
I like it but im not using it rite now. I don't like to crowd apps onto my Evo.