I know the Verisign and Thawte are well known. What about Equifax? Is it pretty compatible? How does it compare to ISSL and the others - Would it be worth mentioning on your site that you use Equifax, like you would if it was Verisign?

Thanks for the help!
Ryan aka SaBoTaGe ;)

The GeoTrust (sells Equifax Cert) Business ID is basically the same cert. Plus you get better rates and are not supporting Verisign. :)

Yeah they are decent. You can try **********.com too, I have used them for a few of our customers.