For me, at this point it's just numbers. I've twisted the right grip till it stopped several times and unleashed the beast within just for scats and giggles, kinda like Rev said above. I wouldn't consider that makin' real use of the busa's power, tho. The only ways I see to actually "use" the power is to take it to a track regularly and run like a striped azz ape, or to ride the mountains a helluva lot harder than I ride them.
I plan to hit the drag strip as soon as I find a leather ridin' jacket in my size. Draggin' is my main thang so that's where I will make the best use of the power. I will prolly go for a top end run eventually just to say I done it, but won't do it on anywhere near a regular basis. Maybe only once...
I've hit fairly high speeds already so at this point, aside from a few extremely brief spirited blasts through the low gears, I'm content on bein' a poser on the street and twistin' 'er up like she wants it only on the dragstrip. I will keep enjoyin' the twisties but I ride them with a lot left in reserve, both power and handling wise.
I've toyed with doin' a road racin' type track day at some point as well, but only to improve my ridin' skills. No aspirations to take up that kind of racin'... yet. I'm afraid to take a track day for fear of bein' bit by that bug, too. I was instantly addicted to draggin' the first time I took a slow azz stock 5.0 down the 1/8th mile strip!
A bigger goal for me is to be able to use all the handling of my bike. I know I can't do half what the busa can...