some cool NES modiications on here

 

http://www.techeblog.com/index.php/tech-gadget/coolest-nes-mods-ever

 

the sega and nes in one is the best one

pretty cool... Too bad I don't have one

that's awesome. saw one of these featured on Extremetech one day where they made it handheld like th first one.

Those are all really cool. The only one I didn't really like was the cigar box.