Here are my thoughts.
Assuming bandwidth or cost are not issues, then when posting original content, I would like to see it all here. If you want to post it to multiple sites, no problem. Cut and paste is really easy.
When doing research, post the links to the information.
If you want to put a link to your website in your signature (like Jeff does), that's cool with me. Most of us will check it out at some point anyway.
Just my $.02.