Well... went on an alternate ride instead. Heat wasn't bad at all, although I did try to remember to take it easy just in case. It occured to me that we've been riding in this weather already, I just wasn't paying attention I'm so glad I invested in that camelbak though!

Thanks for the opinions all. Oh-- and for what it's worth, I'm a cold weather wimp too, lol. Went up to Boston over the 4th to visit some friends, and was cold in the high 50's. It was so cool to see so many people on bikes up there! Maybe next time I'll take mine with me...