Hi,
I have Verizon BB 8703e with USB tethering plan with my PC. Can I use the Nokia 810 hooked up to my BB using USB cables and use it for tethered data access.? Are there clear instructions to do this USB tethering. I appreciate any help in this regard.

None that I know of, but you should be able to tether using bluetooth to the tablet. There are other post on how to do this.

When I tether my BB to the PC by using a USB cable, I have to run software supplied by AT&T (my carrier). I would imagine Verizon would be the way. As far as I know, neither carrier offers this software for the tablet (or even linux).