Hi Matt, first thanks for getting the time to read my post, and replay. The problem I still see is that even if you have your domain the link is messed up. From your blog.

http://feeds.mattcutts.com/~r/mattcutts/uJBW/~3/8IurStR5fXw/

Goes to

http://www.mattcutts.com/blog/pubcon-2012-slides/

So if I bookmark the former, and FB dissapear you will have to create a full list of 301 redirects in your server so my links still work. Yes you have the control, but that is a lot of work.

Why not make FB links like this?

http://feeds.mattcutts.com/blog/pubcon-2012-slides/

In that case all you have to do is a 301 of feeds to www.

Hope my point is clear.

Edit: never mind. Someone found this http://www.wangarific.com/how-to-get-rid-of-feedproxy-links-...

That way you really have all the control back.