Piles of stock spam from Gmail last couple of days

In the last few days, I have started receiving piles of stock spam from Gmail touting the ticker symbol RQST.PK.  I see these spams in my Gmail account, my Frontbridge account and now my Yahoo account.

I still get spam from Hotmail, but it's confined to my Yahoo account.  I understand that my sampling is under-representative, but it certainly looks like a pattern.

Anyway, to Google, I have one piece of advice: it's time to implement outbound spam filtering.  I see people on dsl accounts connecting to Gmail and then seeing the message relayed through Gmail.  In other words, looks like Google has the same problem we have.