Originally posted by mikemike I'm thinking a GOD HATES INCEST sign.
The only thing I could find is that the Phelps family are all lawyers (of course.. chilling thought) and that they all make 6 figure salaries. Not sure any company, except maybe a giant evil corporate such as Monsanto or Haliburton, would steep so low as to fund a group like this with strong ties to the KKK.
EDIT: Just remembered that Visa and MasterCard both have links on the KKK's main website for donations, and say they will let them stay there (WikiLeak's Visa donation widgets, on the other hand, were promptly removed). Wouldn't be surprised if they do the same for Westboro. Unfortunately there is virtually no way of boycotting either of them, unless you love American Express.