It took 32 minutes for the Goo Goo Dolls to sell out Wednesday night's concert at the tiny, 300-person baby grand in Wilmington.If the John Rzeznik-led rock band wanted to, they could have easily filled the 1,200-seat Grand next door."We could have probably sold out the bigger theater in another hour or two, but the plan is to do something special," says Goo Goo Dolls co-founder and bassist Robby Takac. "And it just doesn't play the same way in a larger room. It becomes a rock concert and less of what we intended it to be."The idea for the tour is this: Rzeznik and Takac perform an acoustic co