old_expat - 3:16 pm on Sep 14, 2009 (gmt 0)

There's value in an old domain, keep it. But you should also get the non-hyphenated domain name with exactly the same letters. If someone else already bought it, then you might try to sell him your website.

The non-hyphenated domain was not available when I registered the my version and is likely not available now.

I don't have a problem keeping the domain .. if nothing else as way to redirect to the 3rd site

...I built another site that covers a slightly different version of [ * ] plus additional content... Does this mean your sites are competing in the SERPS against each other? I would keep the old one - so you have two chances to get a visitor. Also don't forget the incoming links (already mentioned). Maybe put a banner on pages with incoming links to direct visitors to the new and relevant content on your new site.

Yes, there is a certain amount of overlap. Instead of a banner, wouldn't a 301 redirect be better?