George (and others), you really need to go down to Staples and pick up one of these PAP2's to play around with. The deal now is even better than free because BestBuy has them on sale this week for $35, which means you can get Staples to 110% PM to the BB price and make $15 or so after tax on the deal. You might want to go soon, I hear that Staples has almost run out of them but that some stores have received more. They are flying off the shelves and both Linksys and Vonage are mad about it since they were never supposed to be unlockable.
I was able to unlock mine with no problems going by the BBReports thread. I also had no problems hooking up line 1 with Stanaphone and line 2 with Voipbuster, and after a 5 Euro deposit to Voipbuster via Paypal I can indeed have completely free phone service for as long as it lasts. I don't think anyone has figured out how to route Stana inbound to the second line so that you only need one phone yet, but that's a minor nit.
This thing has literally TONS of settings that you can play with to tweak it for anything you might want with VOIP services. Since it runs essentially the same firmware as the Sipura SPA-2000 (acknowledged as one of the best VOIP adapters), you have a really neat device to configure exactly how you wish. I can't give you a complete rundown on all the features, there's way to many to list, but I've found the Admin guide for it on the net
here (be sure to click the free download button at bottom). You can look through it as you wish and see all the stuff that can be tweaked. All of it is available after the unlock.