I added the feed to my site so that posts can be seen on my site and so that people can easily become a fan. What I'm wondering is could this be beneficial to search engines and the general ranking of my site when new posts are showing in the feed daily etc. Before my site went weeks/months without changing, now I have new content showing daily through the feed if and when either I update a wall post or someone else does. Can Google see this fresh content or not? Or at least could they see that new content may be changing daily
I think yes because if you site getting majority traffic from facebook so it will definitely increase your website and content ranking.
No, it will not help your ranking in Google or any other search engine by any means. It can help drive some great viral traffic though!