I am thinking of buying a domain for my directory so instead of it being dir.site.com it will be dir.com, im gonna place a link to the new domain asap so it can get indexed etc, and then 301 redirect. do you think that this will be a step 4 the better? will the directory be better listed in this world etc?
I can't see it making much difference unless you get a really good domain name, though it would make it easier to sell the directory if you ever wanted to.