well after having the phone almost a year now i finally figured a way to log-in. i gave up on it for awhile because i could not get it. BUT FINALLY i found out how. the way the main homepage is set to login is weird BUT if you go to a thread and go to REPLY it asked you four your login in a normal way......TIGHT
I have a BB not a Storm but the OS is still pretty much the same.
I know you've figured stuff out already but thought I'd throw this in here for the rest of the BB users.
Go into your browser, while on the "Go to" page hit your menu key (Button with the dots), select "Options", select "Browser configuration", make sure that it says "Internet Browser" by "Browser:".
Make sure all of the check boxes are checked, Show images should be set to "On WML & HTML pages", Emulation mode should be set to "MS Pocket IE", Content mode should be set to "WML & HTML".
This is how I have mine set and RIU works fine and I can log in on the main page. You just gotta look for the username and password boxes.
I've had no problems with these settings since RIU was still on the old skin and even with the new skin still no problems.
Hope this helps.