I just installed Wordpress-MU on http://brap.us and whenever you try making a new blog the subdomain will not work. I tried this: http://animals.brap.us Anyone know the problem? Let me know thanks!
You need to add wild card dns To set up the wildcard domains, select "Subdomains" from Cpanel -- not "Add on domains". For your site, put an an * in the form field and then select the shared website from the drop down box. In the other text field, point it to public_html/domain (or whatever folder you have your wordpress files in). It does take a minute or two to take effect in my experience, so I thought I'd messed it up at first, but it really does work!