This product was brought to my attention by one of our top customers, check it out: 

CardScan for SalesLogix accurately captures contact data at the critical first step of a prospective relationship — the point where contact information is exchanged. CardScan accurately reads all of the contact data on paper business cards or in email or web signatures, then transfers that information to your SalesLogix system.

Here is the web site for more information http://www.cardscan.com/products/for_crm/saleslogix/saleslogix_features.asp