I wanted to try the google music app too. sad :/
but we'll find another. right now the stock one accessed from the status bar while reading works okay for me.
with the no refresh, it really depends on the apps. I get what you describe now and then either. But if you use it with Bar Shortcuts
it works like a charm. At least for me. Is your firmware 1.0.04.12210?
I use fbreader with colordict, tried droid fish chess, the choice games... a lot of the apps from the wiki actually. total commander is not very reliable with it, but it already supports partial refresh out of the box, so it's not a big dealbreaker.