just to mention. wordpress mu have special plugin for it
that theme at my example is custom made.. and with some plugin like i say that only work with mu wordpress
Wow, I didn't realise that. But, presumably, you wouldn't be able to just upload themes to your subdomain? Would the admin have to upload a load of themes and then you can choose which one to activate on your blog?
Also, when I tried to install it, I think there was an option that asked for help (from a real person), so it may be worth giving that a try?