Am I crazy, or do multiple linkdomains at MSN actually produce sensible results? Check out this search:

(linkdomain:seomoz.org | linkdomain:threadwatch.org | linkdomain:seo-scoop.com)

I think it's showing sites that link to any of those domains, not all three, but still interesting. Someone should play around with the operators some more and see - I think MSN is relatively unguarded about showing link information.

Thanks to squiet for the tip!