While this might not be as cool as it would have been a few years ago, what with the Wii Virtual Console and emulation all the rage these days, I still think I would have don't pretty much anything to have one of these things in the early 90s. Who am I kidding, I'd love one today. It's called the FC Twin, and it's a console that plays both SNES and NES games.
The FC Twin isn't even a hack… apparently it just started being manufactured at the end of last year after the patents for both the NES and SNES expired. You can even buy one on Amazon for $45! My mind has been blown.
Hybrid NES/SNES Console [TechEBlog]