I've got space for a 728x90 banner near the top of my site. $1CPM is the cost, and the site got over 660k impressions on the front page last month(Jan07), so the cost for the next 30 days is $650. Your banner will be the only banner in this spot.
Some more stats for last month include:
85% en-us traffic, 67% bounce rate, average time on site of 2min30seconds and 16.67 pageviews per unique visitor. I have very sticky traffic.
The site is
www.RateThisWhore.com.
Payment via Wire Transfer, ACH Transfer or Epassporte only. ICQ 1183251 if you're interested.