The guys over at The Unlockr have put up a guide on how you can root your HTC Hero smartphone in just one click. There is a full list of instructions on the website but if you need a little more assistance, they have also posted a video to help get you over that finish line.
The benefits of rooting your Hero mean that you can open the phone to homebrew applications as well as other utilities. This includes custom ROMs. Check out the video guide after the jump.