I have a few Drupal installations and I am seeing referrals from MSN Live for things like one word city names. I just started a site, so It would be impossible IMO to rank so highly so quickly. It reminds me a bit of the scam sites that show they have have linked to you while in actuality they haven't.
I get very similar things happening to me where my logs show visitors coming from page 1 of MSN Live for some huge generic terms but when I go and search for them I can never find my site. I wondered if it has anything to do with geographic location or data centers but at the moment I don't know what to think. If anyone has any answers or clues even, we would appreciate hearing them...