You also have a FDCPA violation for using documents that simulate legal process. Here's the reasoning:
1. Suit was filed, but was dismissed in October 2007
2. In April 2008 the attorney issues a subpoena claiming the pending litigation as legal basis for the subpoena. After all, if no lawsuit is pending, what basis does a subpoena have, since you can't use court methods to prosecute a matter that is not before the court.
3. That subpoena, not having any actual litigation behind it, is not a valid subpoena, but simiuates one, in violation of FDCPA.