Now that some pre-orders are getting filled and the EVO 4G LTE is in the hands of Android fans, it was just a matter of time before it got rooted. It's a pretty simple affair, using the same exploit as the Transformer Prime after the Ice Cream Sandwich update. It's pretty simple -- install drivers if needed, then run a small script. The end result is a rooted EVO, which makes us all warm and fuzzy inside. Of course since it's brand new there won't be much happening on the ROM and hacking front, but that will soon change.
As always, be careful and think about what you're planning on doing, because the developers can't be responsible for the things you might do. Now that you've been sufficiently warned, hit the link and check it out.