WRONG! The 8700g can be tethered to a laptop.
There is only one difference between the 2 Blackberrys. The 8705g is hearing aid compatible. That is the only difference.
Edited: I went to the comparison page. If you click "modem" you will see two things listed. Both have the RIM wireless modem. However, the 8705g has a second check mark, "tethered modem capability 2" which means it is for some future use that is not currently offered. The RIM wireless modem does work now on both 8700g and 8705g. I tether my 8700g about once a week to my laptop.