I’m not sure if others are doing this, although I am sure there are plenty of people who are. I registered several long tail keyword domain names related to one of my websites. In lieu of spending time building a mini site, I used WhyPark to rapidly deploy several websites.
On each of the websites, I added a couple of links – one to the main page on my website and another to a sub-page that the visitor to the site would be interested in finding. The longer tail keywords aren’t all that competitive, and my hope is that I will essentially have two websites in the top of the results page.
I will do a bit of link building for each of these mini websites, and I will not link to them from my blog or other related website, where the cross-linking could possibly be tracked and a relationship detected.
I don’t know if it’s going to add “link juice” to my primary site, but the long tail domain names would be valuable in an of themselves, and it’s much easier for me than building individual sites.
Also similarly related, I am close to selling a domain name that I put to sale using WhyPark just a few weeks ago. A real estate agent from California contacted me and we are working out a deal.