the only way bluetooth can be used for internet would be via a bluetooth-enabled cell phone used as a modem. its not like wifi.
yeah id love to have bluetooth for my sentia (phase 7) but a usb dongle/module sticking out three inches just doesnt seem to be very appealing/practical. there are a few bluetooth pc cards out there (i think belkin makes one) but ive never heard/read anything about them (good or bad). its the closest thing i can think of to having "integrated" bluetooth in a laptop.