i haven't seen a thread about this, so i thought i'd share. If you go through live.com (an MSN site), any buy-it-now purchase on ebay qualifies for cashback. Right now the cashback is at 30%, so you could get a new Schwinn Madison or Bianchi Pista for $280. There's tons of other deals on there (including a bunch of BD bikes from chicabike) that could be had for cheap. i recently got a Tricross SS for $420 after $180 cashback. The only caveat is that you have to wait 60 days for the cashback to be sent to your paypal account, but you can track it on your live.com account. i've already gotten a bunch of other stuff this way too (and have already received over $200 cash back).
Anyway, i'm not quite as knowledgeable or as antagonistically critical as others, so i don't add much to the discussions around here. i just thought this may be a way for someone to get a bike who might not have otherwise been able to afford one. Or someone to just save a few clams. Post up if you get something.