Ok, I haven't yet rooted, but as HTC keep pushing the date for 2.1 on my hero back i decided that i want to root. My main concern is that it voids the warranty, however i understand that you can simply un-root the phone before you send it away to get fixed. BUT, what happens if your phone fails to turn on, or that your motherboard is 'screwed' (which happened to me about a month ago however warranty covered it). How can you then un-root your phone before you send it away? or is that just the risk of rooting? Cheers.