Okay, here's what I've found so far. I have probably a couple hundred favorite links from older computers I'll try to look through this weekend if I have more. I think this at Instrctables was the best I found for wiring though.
http://www.instructables.com/id/LEDs-for-Beginners/
And the past few times I've bought LED's I got them here:
http://c-leds.com
This place is great, they have LED drivers, and as well know quite a bit about LED's. They've answered several questions for me via email and as well put together variety packs for me.
Another thought for some of you truckers handy with fine soldering, is SMC LED's. Those are the surface mount ones you find on circuit boards and what not, very small, about the size of a match head. Seems they might be great for running board lights, marker lights, cab lights, all sorts of things that might be lit but not room for a 3mm LED.
Not RC, but here you can get an idea of size and tips for soldering.