Hey I just purchased a Nexus One from a guy on Craigslist (first mistake, I know) and it turns out it is a rooted Nexus. I have no idea what I'm getting myself into, I know it voided the warranty but other than that I'm pretty much clueless. It's running 2.2 but I don't know what all is going on because of the root. I would like to know the following: How do I tell what was used to root it? Is there any way to unroot it? How do I remove the memory card that came with it and replace it with a new one if the bootloader is on the old one (do i need to transfer it?). What kind of sweet things can I do once I find out more about it (perks of rooting besides trackball colors)? Sorry I'm a totally new to Android and absolutely clueless to rooting. Although I did make the jump to the nexus from apple and the iphone so at least I know what's good for me. Any help is greatly greatly appreciated.