I have configured the N810 "Internet call" program with a Sipgate account by using Sipgate's help page for Nokia Voip: https://secure.sipgate.com/faq/setup/index/id/26. The screenshots are of a different piece of setup software from Nokia, but it contains all the relevant info that needs to be filled out under the new SIP account setup.

I can successfully use Sipgate for outgoing calls, but I would like to set it up as forward number for my Google Voice account. Unfortunately, GV can't or won't call my Sipgate number. I also can not reach my Sipgate number from a landline, but it tests fine with an Echo test.

Any ideas?

The recent GoogleVoice thread that mentioned sipgate brought my attention to it. Kind of odd that we are taking a google voice competitor and using it as a GoogleVoice endpoint

I tried it out and it work great, for what its worth.

Have you confirmed that you can get any type of inbound SIP call? If you hunt around on Ekiga's site, I think they have a callback test. You call the number and it calls you back. Have you confirmed the port forwarding for your router works correctly?