I want to start posting unique content on DOFOLLOW places like: Wordpress Blogs BLogger Blogs Wikispaces Zimbio Xanga MSN Spaces Tumblr Webs.com Google Sites Tripod Etc. etc. I want to place an article with a backlink to my main site to each of these sites each week. But I am wondering this: Is it wise that i update these thing weekly or is it a waste of time? Should I instead be submitting to even MORE similar sites and just doing *1* post each? Correct me if I am wrong but: These sites are more respected if they are posted to each week, right? Or should I just find as many sites as possible and just try to get as many backlinks as possible, even if I do not update often (or even at all)???