dstiles - 8:03 pm on Sep 4, 2010 (gmt 0)
I remember the tail-end but couldn't recall if it was msn or google. :)
Possibly a (b for) beta? Doubt it, though.
Interesting aside: both msnhst.microsoft.com and msft.net (and also microsoft.com itself) are listed in spam databases, albeit mostly for being "rfc-ignorant". :)