Thanks for mentioning my e-book Kelly. It was written for the complete novice, and yes, even has a section on asking support to enable wildcard hosts. Some people just do not know what to ask for, or how, or even if they should.
A lot fo people like to have a reference guide broken down into tiny steps with loads of screenshots to make sure it’s done right – even if it takes them more than five minutes.
One of the *biggest* obstacles in getting BP working is making sure WPMU is installed correctly and working. This document helps with that.