Dole whip is just pineapple soft serve ice cream and a dole whip float is the dole whip with pineapple juice at the bottom.
Honestly we tried it last time we were in disney (nov. 08) and weren't all that wowed by it. Maybe because it was FREEZING! I'm sure if i was hot and sweaty and had a dole whip it'd be much more refreshing.
I know this has nothing at all to do with the OP's question...but I had a Dole Whip float at the Dole plantation in Hawaii and it was sooooooooo good! I want one now...
Mmm, Dole Whips. I love getting the float but it gets so sticky and messy! Only difference is that floats have pineapple juice; soft serve is plain in a cup.