Joined: 01 Jun 09
08 Nov 10 12:18 am
I have not come across any restrictions on facebook as to the kind of links that you can post, though it's possible that I may have missed some things there. But I know that certain affiliate programs do not allow you to post affiliate links on social sites.
Putting up a page about the product on your own site and posting a link to that page on facebook should not violate anyone's policies.
I hope that helps :)