Using a similar address to above, (the xxx is replaced by my company's domain) I've tried Opera and the Blackberry browser on my Curve in regular mode and MS IE emulation and I get the same error, "unable to connect to the Internet" or something like that.
I am doing this while I have 4 bars of signal strength and can connect to other websites and get email and SMS.
I'm wondering if there some sort of browser limitation on the BB?