Hey guys. My client owns http://www.something.com He also owns about 30 other domains that are similar and we did a 301 redirect to for them all to the main site. http://www.somethings.com http://www.bluesomething.com etc etc. Some of the 301 redirect domains are either brand related, similar to a competitor but adding a "s" at the end, old domains with high PR etc. My question would be. Is it a good idea to build backlinks to the domains that are 301 redirected? Or should we just focus on the main money site?