
Originally Posted by
martink
I'd do 301 permanent redirects for the 5 keyword rich domains to the main domain. That way, no one can buy-up those domains, but they point to the main site.
All other options are bad ideas to be honest. You'd be cannibalizing your own traffic. One of the number one rules in SEO is that you don't want to have more than one site for the same company or you are stealing your own traffic. You aren't optimizing more; you're spreading yourself thinner. If you're client is asking for this, recommend that you optimize pages on the main domain for these keywords appropriately - even create specialized landing pages for PPC. But don't create new domains for these keywords. Google won't appreciate it. Your users won't appreciate it. And in the end, your client won't really appreciate it.