WordPress MulitUser (WPMU) adds some very power features with only a quick (under 5 minute) setup. In this video I’ll walk you through how to upgrade your blog.
Not sure what WPMU Is, here’s a great post that will tell you all about it.
Five Day Fix: This is Paul Prissick's genius method for pulling in $500+ in just 5 days. This case study starts from zero and shows you exactly how he did it. Best of all, it's step by step so you can do it to. This is the Full case study and it's easy for anyone to implement successfully. Check it out here!