TJFAST,
You have mail with some info. Unless you plan on drag racing I would not go with a full wet NOS system. You can get about 150hp hit, but can do some real damage to the bike.
You can get up to 170-175hp with mods even before NOS. If you are really set to have a NOS on the Busa (You are really sick) Go with a dry NOS that will give you a smooth hit of 23-30hp. I suggest you do it in stages and don't worry about the NOS until you maxed out the mods. NOS, does have some advantages if done right over rebuilding the engine with a bigger bore etc..
Also remember to put on a safety cut-off switch.