From the website:

Jigsaw is an online directory of more than six million business cards. Every card on Jigsaw has an email address and phone number, allowing members to bypass gatekeepers and get directly to decision makers and influencers. Jigsaw has become a required resource for sales people, recruiters, marketers and small business owners.

Jigsaw's unique directory is built and maintained by over two hundred thousand members. Using a point system for credit, members trade business cards they have for business cards they need. Members also get point credits for updating incorrect contacts, and get point penalties for adding bad contacts.

Jigsaw's mission is to map every business organization on the planet. Each Jigsaw member brings a few pieces of the puzzle, resulting in a disruptive change to the way corporate information is gathered and maintained.