NullDC is a godsend. I don't have 3D, but I love to be able to save my DC for the few titles that actually require the real HW.
As for the comments earlier about other systems. PS1, N64 and Saturn emulation are pretty much perfected too, not in 3D though. I only use my real Saturn for light-gun titles these days. PS2 is hit or miss as is GC. The Xbox on the other hand seems to have zero interest from the emu community, which is surprising considering it's PC like HW.
Silent Hill 1 on PS1 in 1080p look surprisingly good, and Conker's Bad Fur Day looks as good as a many GameCube game. With the right plug-ins and a decent GPU you can re-live those titles the way that they should have looked.
The Wii emu's are looking great thus far too, and things will only get better.
XBL: WiiVault Wii: PM me PSN: WiiVault
PC: AMD Athlon II Quadcore 635 (OC to 4.0ghz) , ATI Radeon 5770 1GB (x2)
MacBook Pro C2D 2.8ghz, 9600m GT 512 iMac: C2D 2.0, X2600XT 256
