I got my first IR G2 just over a year ago (April 1, 2009) but it had a defective lens. It's replacement arrived a few weeks later. Since then I have posted 151 IR landscapes and 38 IR portraits to Flickr. I'd say that's a fair amount.
Personally, I think IR is awesome. I really want an IR-converted DSLR. The D70 is an older model, but it's lightyears ahead of the G2 I use. I imagine you'd have a blast shooting IR with it and the 18-55 kit lens. The only concern I'd have is that the D70 is in good working order. It'd suck if you paid to have it converted and it stopped working soon thereafter.
Salty is evil, but he's right.
Shit, the rest of this post is going to have to wait. We've just lost power on MV, and I'm running on battery