Perhaps it was just a quirk, but for a search term on MSN, I found in the #1 spot a link to my client's site that was a link from an AdWord ad I run. I can clearly see the tracking code in the URL when I clicked on it. My guess is that the MSN spider must have somehow followed an ad link and indexed it. I'm not complaining, just wondering if anyone else found anything like this. I doubt MSN (or Yahoo/Inktomi) and Google are up to anything, especially since it smacks of paid inclusion.