Does the site map that is automatically generated include user/member profiles? What about tags? It seems like it doesn't but maybe I'm missing something.

If the answer is no, can you please help me understand the rationale?

Also, if no, are you marking all those pages "no index" or just not producing a site map for them? 

Thank you for all your help! 

Eric 

It does not include profiles or tags. These are low value pages typically that house internal pages and do not have real content themselves. They don't have 0 value, especially now that Google has decided it likes attributing authors but there are better pages to dangle in front of search engines to say "index this."