Here's what I've done about the signup errors. Since so many people were having the same problems, I made a catch-all, do-it-yourself, override solution. If you enter your information in to signup and it fails, you are presented with a much clearer, more comprehensive set of explanatory messages. If those do not help you solve your signup problem, then you are given the choice of overriding the error checks. This will insert your account into the blogskins database, but it means that you'll probably have problems previewing and applying skins. But, at least you can login and post skins. I'll keep working on the other problems.

Related to this solution, everyone (logged in or not), can use the "BlogSkins Preview Blog" to preview skins. So, if the system can't retrieve your list of blogs, at least you can preview it with something.

Lastly, I'm working on the forum thing. It should be up soon.