I have been blogging on my own for several years now and run a successful blogging tips blog and want to start a new collaborative blog on a pr 2 site that I own. I wanted to spread the word and see if there was any interest from the dp blogging community. I wrote a post with more info if you want to check it out.. http://tycoonblogger.com/blogging-tips/what-is-co-blogging-and-7-reasons-why-it-might-be-a-good-idea