I think the BuddyPress listing would work well for some kind of members-only section perhaps - but for the sitewide navigation I need something that is more accessible to the general public, something that has more information. This site will likely have a solid community, since many potential members/contributors already have long standing online friendships with each other.
However, generally the writers/artists are professional (or that is their goal) and the site and their blog would ideally serve as a showcase for potential employers and/or publishers.
Something more like this perhaps;
http://www.huffingtonpost.com/theblog/index/
I don't want much, do I? :-)
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Oh, and BTW - thanks again for all your suggestions. The sitewide tags plugin is working out well for all tags and categories.
The one major stumbling block is the failure to import thumbnails correctly from contributor blogs to the main page. However, Magnus Jepson at Woo Themes is willing to try to find an in-theme fix. (I'm using the Woo Headlines theme designed by Magnus)
Working thumbnails are a must, so I have my fingers seriously crossed. I'm quite sure that I"m not the only user of sitewide tags that is missing thumbnails - so I just can't imagine that SOMEBODY hasn't solved this problem, but if there's a solution, I haven't found it.