I think Blockoban would make a great iPhone game... I'm quite rubbish at it, but it is one of those games that you can just pick up and play when you're bored, and easily stop if you have to.
I was surprised when I want to local save the level, I thought that the "UPLOAD" is "LOCAL SAVE". When I clicked on it, I was scared that my level is on the web.
sound on / off added (burfy's feedback).
16 official levels now. All levels are great. I must say I'm a big fan of Psychotronic's levels (thx Psycho). When a level is "only" accepted, it doesn't mean it will not be official one day, it's just I'm not sure for now.