I've seen Intellivision Lives! for the PC, which does come with an emulator, and it can be hacked to run the other ROM images

. This way, at least you can support the Blue Sky Rangers.
One of my friends does have this. It runs on XP Professional.
BTW, I still have my 128D also. It's got a lot of modifications like JiffyDOS and such, and I will be putting a Windows 98 machine on it to serve as a 64HDD server (so I can play all the 64 games on it). Works just fine.