I second the "gloves and shorts" shopping list.

Wear any ol' wicking shirt you like. I don't wear bike jerseys, even on my longer rides. I generally wear a long-sleeved wool t-shirt or turtleneck.

REI will most likely have flat pedals for you to use. So just wear some comfy tennies the first day.

And most important: HAVE FUN!!!!

(we want a full report!)