If you went out and picked up a Samsung Epic 4G Touch and have plans to hack at it, here's your starting point -- zedomax at XDA has worked out a root method for the new handset, and has full details and downloads to get you on your way. You'll need to have Samsung Kies and Odin 3 installed and running (boo!), which means this is Windows only for now, but long-time users of Samsung's Android offerings should be used to those requirements. There's also a note that things are still in the "experimental" stage, so caveat emptor and all that.
Warnings aside, early reports seem to be positive, so if you're ready to get things rolling head to the source link, read the directions and watch the videos, grab the files, and give it a go!
Source: XDA-Developers. Thanks everyone who sent this in!