How do i connect My PDA to my Broadband?
Yeah its possible to do the same all you need is a Bluetooth Access Point for e.g D-link DBT-900AP. It will plug into the spare Ethernet port on the Router. Also you don't need your PC to be switched on for the same.
D-link DBT-900AP Bluetooth Access Point
Difference between 3G Data Card and a Wireless Networking Adapter?
A 3G Data card will connect to your Laptop and is a PCMCIA Card. It enables you to connect to 3G mobile Phones / Data Network.
A Wireless Networking Adapter enables you to connect to a Wireless Network within the Range (Your Broadband Connection)
The benefits of 3G Data Card is that it enables connectivity in large parts of UK. Also it enables you to Switch over to GPRS where ever yo don't find 3G coverage. This is not possible with Wireless Networking Adapter as you have to near a Hotspot or local access point. Not helpful if you are on the move.
The only benefit of the Wireless Networking Adapter over 3G Data Card is that the Speed available with the WNA is more than 3G Data Card. Also the cost of 3G Data Card is more.(cost of the card, monthly fees and bandwidth costs)
Wireless Networking Adapter 2Mbps to 54Mbps (limited to availability)
3G Data Card 384Kbps
Orange 3G Data Card
Vodafone 3G Data Card