I'm insanolord on there as well. I do most of my iOS gaming on my iPhone, but I currently only have GameCenter on my iPad since I'm still on 4.0.1 on my iPhone because the jailbreak makes upgrading a bit more complicated. Once 4.3 comes out (likely within the next few weeks) and there's an untethered jailbreak for it (probably very soon after that) I intend to upgrade.