I can't wait Laura!
Billy Sheehan is easily the greatest bass player i have ever seen live - if you know anything aobut Steve Vai let me just say Billy was playing many of the guitar harmonies on bass!!! (virtually impossible for us mortal guitarists to do just on guitar!)
He's also a pretty good vocalist, but his bass parts are amazing... so much better than the root notes we get from Alec/Hugh*
*this is why i always liked the intro to All I Wants is Everything, or Fear