If you're serious about olympic lifting, get the shoes with the wooden heels. It's like night and day.
There are lots of options: I just got a pair of Do-Wins through Glenn at http://www.ZhangKongUSA.com
for my daughter ($85) and a pair of the Model A shoes through Joe at PowerFirm at http://www.weightliftingshoes.ca/index.html
($120) for myself. I can recommend both vendors highly - they're both friendly and helpful, and my daughter and I are both happy with our new shoes.
Several sites sell the Adidas, including dynamic-eleiko.com. I got some other stuff from them - not shoes - but I can tell you they're good folks, too.