I've always been a late adopter with VOIP technologies and never used it until we switched over to MagicJack a couple years ago. I never even played with Asterisk until last November, when I added it to a hacked Dockstar. The main reason was to set up an in house intercom system using a Linksys PAP2T and Blink softphones on my wife and my laptops. When the OBI 110 came out, I immediately thought it was a neat new toy and so did others. I finally got one a couple weeks ago.
I initially configured it to use the MagicJack for all outgoing calls and incoming calls would come via MagicJack, Sipgate and Google Voice (via forwarding to the Sipgate number). This weekend, I configured the OBI to be a gateway for the Asterisk server for outgoing calls. Now, the kids' phones on the PAP2T, can not only call in-house numbers, but they can make outgoing calls through the MagicJack. Our Blink softphones can do the same. I'm thinking about having incoming calls also forwarded to the Blink clients as well.
I had configured Asterisk to allow outgoing calls from Blink via the Google Voice hacks, but it was always kludgy and sometimes didn't work. This seems to work nicely so far.