@FarNorth - Eek!
I've had this tablo for almost 3 years now. I don't think Remote viewing has ever been usable. I may install a wireless power plug on the tablo, so I can initiate a reboot remotely. But it just feels like a terrible hack and I risk interrupting any active recordings.
Honestly if folks making cheap wireless plugs, lights and cameras can get remote access working on my home network out of the box without any effort, why can't tablo?
Also a friend of mine who I recommended Tablo to cannot get it working either. I feel somewhat at fault for recommending the tablo to him. The only difference in his setup is he is running with a Comcast rented combo modem/router.
Anyway, fingers crossed they can fix me. I'm hoping its a known issue by now and they have something in the pipeline to resolve it.