wrgvt - 4:34 pm on May 2, 2006 (gmt 0) [added]
I'm getting conversions and making a profit so far with AdCenter. I'm having a problem separating out orders to know exactly what my conversion rate is, so I'm not sure how it compares to AdWords, but it's close. My cost per click, though, is well under what I have to spend on AdWords.
The number of impressions and clicks, though, is well below AdWords.