I found a common denominator for the sobig emails. I don't know if this is common knowledge or not, and frankly I don't care. But, if you're tired of having to manually swim through an inbox clogged with sobig emails.... set up a "rule" in your email client, or vi your killfile, or procmail, or whatever to have all emails with "Found to be clean" in the headers sent off to the ethers, email hell, dev/null, Sen. Santorum's ass, or wherever.
So far, I've been using this for a few days, and I've found that it has caught all the sobig emails, and ONLY the sobig emails. But that's just what I've seen, so don't get mad at me if it does something different for you. Use at your own risk. Not valid on Pluto. Must be at least this tall to ride this ride. No purchase required. Bugger off.