Hrmm... tips. Well, budget on what you think its goign to cost, then double it! As you said, there is a million things you will forget.
For me, atleast, a cam only ls3 wasnt enough. Seriously consider how much grunt your going to actually want, and how your plan on getting it before go ahead and put it in.
As a minimum put a decent cam/springs/rods in it while you have the engine out. cams are cheap!
Dont take the converter box route, change the reluctor wheel, and while you have it apart, fill it full or ARP bolts on re-assembly. That way you can rev its head off, without its heads actually comming off.
There is heaps of options mate, but it really is a simple swap. Mainly electronics that need changing. Your knock sensors are in a different location, as well as a few other bits and pieces.
good luck & ask away!