These are some noteable people who have contributed to Loserman in the past:
Andre Agassi tennis
Sandy Berger former National Security Advisor
Jeffrey Brotman Costco chairman
John Chambers Cisco ceo
George David United Technologies chairman, ceo
Herbert Kelleher Southwest Airlines chairman, co-founder
Henry McKinnell Pfizer chairman
David Neeleman JetBlue ceo
Brian Roberts Comcast chairman, ceo
James Sinegal Costco ceo
David Stern NBA Commissioner
Ronald Sugar Northrop Grumman chairman, ceo
Donald Trump real estate developer, game show host
Gary Winnick former chairman of Global Crossing Ltd
James Woolsey CIA Director 1993-95
Now, whether they still support him is unknown. I'd hold off a bit. After all, they gave him money when he was still a Democrat.
More here:
http://www.newsmeat.com/campaign_contributions_to_politicians/donor_list.php?candidate_id=S8CT00022&cycle=2006