Facebook API - Any experience on integrating it on your php site?

Hello all,

I would like to have, on the same page, two things:

The list of wall comments of this site facebook account.
+
A like button somewhere so that others could say that they like the page.

Problem:
In order to list the wall comments I need to login with “site facebook account”;
In order to do a like, the users needs to login with their accounts;

If the uses presses “like”, and he does the login, the login associated with the site will be lost.

Has any of you have experienced anything like this? What can I do to overcome this issue?

Thanks a lot,
Márcio