Love emulation on the Wii. Its totally killed my collector's urge to fill in gaps in my 2600 collection with overpriced titles like Tapper.
If you use Homebrew channel, its super easy to DL and install all the emulators, and HBC is compatible with the latest Wii system update--just check out homebrew.org. They are very anti-pirate there, so tread lightly, but they have all the resources you need to get started.
Be sure to
check the HomeBrew.org thread on compatible media--I just upgraded to the A-Data 16GB Class 4 SDHC card and love it, with plenty of room to spare for WiiWare demos and to back up any of the WiiWare games I buy. Mwave.com usually has the best price, and sometimes it goes on sale for $19.99 with free shipping:
http://www.mwave.com...riteria=BA47465
Once you get the apps, there is a quick edit you may need to make to the meta.xml file with a text editor (any will do)--I noted this edit here on Atari Age a month or 2 back--u need the app to
not make a network check at launch otherwise you will get a core dump and a lot of instability.
Then you just need the ROMS. Check the Harmony Cart thread for some decent ROM compilations for the 2600 all ZIP'd up nice and pretty. There are not a lot of 7800 games, so DLing them from here at AtariAge is not a big deal either.
ROMNation.net is a good place to get individual ROMs, or you could try and hook up with someone from the
Lazarus Project.
I can't seem to get my Intellivision emulator running, and WiiEngine/Turbo Graphx 16 doesn't work worth a damn, so go with Hugo for TG16 and you'll be happy--there are only a couple of TG16 ROMs that done't seem to run on Hugo, and if you have never played a TG16, you'll be really surprised at the quality. I have not pursued any of the Coleco Vision emulators. They also have some older computer operating systems, along wiht SCUMM and DOS Box.
I run emulators for NES, SNES, GBA/GBC/GB, Sega Genesis, Turbo Graphx 16, 2600, and 7800. There are two 2600 emulators--I'm partial to Wii2600, but feel free to use what feels good. Most recent console emulators tend to struggle a little more--they do have apps for PS1, N64, Saturn, GC, and even the DS, but as I mentioned, more recent hardware is a little sketchy to run.
There is some good home brew to play too--a good 2-D Portal game that was ported from the DS, Quake, Doom, Heretic, a great blackjack game called Wii Double Down, a good Yahtzee, Mahjong, a sometimes unstable Super Mario Wars port, a Picross clone, and some other things to play with. You can use WiiExplorer to set up an FTP server if you prefer to FTP files to your SD card rather than using an SD card reader, and even some hacks to play DVDs.