To elaborate, I'm the editor for YouMoz. If you submit a post that says "At my SEO Company, we blah blah blah" and you link SEO Company back to your site, that link is not going to stay in the post (if the post gets published).

We certainly do allow links in YouMoz, but they must have a purpose. I've written more about the YouMoz process at http://moz.com/blog/inside-youmoz-how-to-guest-blog-for-moz.

That assumes that you can get a link to your website from a guest post on Moz.

This post may also be of help: http://moz.com/blog/how-should-you-handle-expired-content

Oh meta keywords, curse you and your inevitable betrayal.

I'm working from home today and trying not to wake up my husband because I'm laughing so hard. Time to move downstairs before I read any more replies!

What blog platform are you using? That'll help us provide a more specific answer. Thanks!