I received the same letter. I had no idea what it was about at first, but the name EdgeTech International seemed vaguely familiar. After thinking about it for a few minutes, "EGIL" popped into my mind.
I did a search for it in my Scottrade account history and found that I lost $1,712.48 on trades and also spent $194.73 on commission fees related to EGIL trades between 09/13/06 and 06/28/07. Worst stock I ever messed with and I haven't traded much at all since then.