Ok as long as you have the unlimeted data package for your BB then this is free. Sprint PCS Software: Sprint PCS Connection Manager Software from Sprint
In the drop down list, select the operating system OF YOUR LAPTOP/DESKTOP (not your Blackberry device), and download "Sprint PCS Connection Manager for Phone as Modem/USB Cables."
Then, install the software. During the installation process, you'll have multiple options for isntalling drivers. Just make sure the Blackberry drivers are checked.
restart your computer and that should be it. From then on, you can connect by launching the connection manager, connecting your 8703e, and clicking on "Go."
I use it on my laptop all the time, Speeds are faster then one of those cards you can get from a carrier.