I've read through this entire thread, and am glad you went along with the WM bike, Caroline. Personally, when I start school in the fall, I hope to buy this one:
http://www.walmart.com/catalog/produ...uct_id=4990075 or a similarly-priced road bike. Best of luck with your new ride!
i would advise again that bike. i just had one a week old in my shop with a faulty bottom bracket and snapped spokes... just a fyi