Hi all, New android user here migrating over from an iPhone. With iOS, there's only the one Market (AppStore), and the phone syncs constantly with iTunes to keep a list/backup of all purchased apps. Been doing a little research since ordering my phone, and it seems that there's at least 3 different ways for me to access the official Android Market; the official "Market" app, Amazon App Store, or App Brain (and maybe others)? A few things aren't clear to me with this setup. First, are these all separate markets, or just different front-ends on the same, official, android market? Second, either way, how is your purchase history maintained? Do I need to actively keep track of what apps I've bought, and from where, or is this handled automatically in some way? Finally, my wife has been using a Droid X for about a year and has a few paid apps on it; since we're (now) on the same cellular account, is there a way for her to share those apps on both phones, as we could with two iPhones?