I'm having some problems getting DUN to work on my laptop. I can get Bluetooth DUN to work find, but I will only get UMTS speeds. If I can eventually get USB DUN to work, will I be able to get HSDPA speeds?

When I connect the BT DUN, I see that the Treo has the large U and never actually uses the data connection. So I suspect that the BT DUN is using the voice UMTS, not the data UMTS. Any ideas?

Also, what would be the benefit of purchasing PDANet?

And finally, someone off-topic, I have a Dell Wireless 5500 Mobile Broadband (3G HSDPA) Mini-Cardfor Cingular in my laptop. Does anyone know of a way of unlocking this device so I can slap in my AT&T Wireless SIM?