The aptly named Gary Kreep is one of the more notable elements of the birther movement. Kreep is the executive director of the United States Justice Foundation (it’s truly insane piece of wingnuttery), a California-based non-profit organization dedicated to undermining Obama’s presidency. He has been known to team up with Orly Taitz, which has not exactly been beneficial to his (already completely lunatic) cause.
He has also, apparently, sued the Department of Homeland Security for its targeting of conservatives (warning: this site, run by one Trevor Loudon, is an utterly insane conspiracy theory website).
Diagnosis: Rabid wingnut whose misguided fury has blinded him to anything remotely resembling reality. His impact is uncertain, and the birther movement appears to be on the decline now, but it may be worth keeping an eye on him.