New Mitglieder variants

FSecure posted today that more mitglieder variants have been sent out as spam. Not sure if that is what I’m seeing. Sounds like it though.
http://www.f-secure.com/weblog/#00000533
At my company I began seeing heuristic detections in our inbound email at 1:30pm eastern and lasted until 4:30pm. There were about 250 virus emails in that time period.
The file is 1.exe. Usually the message I get is about the actual viral code so that file is probably inside another file. There was not a single source IP address for the messages.