Wahsington Post confirms that LinkedIN is still growing:

More than 13 million business people — at a rate of 20 per minute — have signed up for LinkedIn, a business-networking Web site that invites users to submit their professional information and connect online with colleagues and other business contacts.

“Any way in which one uses your professional network
in the real world, we want to enable you to do that more efficiently using LinkedIn,” said Kay Luo, spokeswoman for the Mountain View, Calif., company.

Think about it.. there are people out there looking for connections. Looking for your expertiese, your business, your book. millions of them.