I recently got my first bluetooth-enable cell phone (a Motorola v195 on T-Mobile). In addition to the bluetooth headset I'm eventually going to own I assume that eventually I'll make use of data connectivitiy of some sort.

I'm aware of bluetooth profiles, but what I've found on wikipeidia doesn't go much beyond defining them, without clarifying when you would need a specific profile or anohter.

I can see eventually making the following uses of bluetooth, sooner or later:

• a wireless cell phone headset
• connecting a BT-enabled PDA to the cell phone for data access
• connecting my laptop to the cell phone for GPRS web access (slow but not unusable)
• sync the PDA to the laptop over bluetooth
• connect a BT GPS receiver to the PC and/or the PDA
• ... ?

Assuming that there aren't any items on this list that are mutually exclusive, which BT profiles would I need to make sure I can support?