My response to this entire thread can be summarized in I hate you.
But I guess this is good transition, since I recently found out some interesting stuff with jabs.
And some depressing info with sing, to be completely honest I was about to report this failure.
What I didn't account for in my trials was that you can push more than one button while asleep. That sounds like the dumbest thing to forget, right? but my method forced me to use two controllers, on a shaky wii, with tap to jump on in 1/4th time.
clearly the implementation of more than one button is sing's undoing, and I discovered this aggravating tidbit about two days ago before I sent off my Wii.
So yes, we might as well consider sing as a cool taunt. Unfortuneately even U taunt is better, since you become two dimensional at one point and any move that doesn't touch the ground misses.
At this point I'm thinking
Taunts<Sing<Dtilt<Utaunt<real moves.
of course now that I've gone and sent my wii away for repairs, so work with jab won't begin until... well... it comes back.
DIBS!!