The emulation is pretty good, much better than previous ATGames attempts. They do use their own proprietary emulation, but so far it's been able to run everything that I throw at it. I have seen occasional hiccups on some of the more intense graphics games and Virtua Racing won't run (Obviously...
I posted instructions on how to add your own roms via the USB port over at the AtariAge forums. Unfortunately, this forum won't let me post a direct link.
jkgamer
I feel like school, back when I was actually in school, was more entertaining though, because of how much I get to interact with people, hang out with friends, and other stuff like that. All I get to talk to at work is my boring coworkers lol