For those who are still down, what box are you using and what methods have you used to try to connect.
First thing, if you haven't tried it yet, reboot your device, i.e., turn it completely off and give it a try. If that doesn't work, here are the steps I took and had working TV last night. (This is just a copy and paste.)
For those with issues, I got things working somewhat by hunt and peck. Previously, I was using IPTV Stalker 9.0.20 (iVue Guide friendly version) along with PVR Simple Client. Before the server issues, they both worked flawlessly. After server issues, neither worked.
I decided to try enabling PVR Stalker Client. I just had to change to my new MAC Address. Everything else was set-up from before. On the initial start-up, the PVR Manager complained, "Unable to load channels." I disabled and re-enabled TV. The channels started loading. They loaded way slower than before, but they were loading. When I initially clicked a channel, I got the all too familiar error message, "Authorization Failure." I clicked again and the channel loaded. Other channels have subsequently loaded. I then pulled up PVR Stalker Client NFPS 0.8.3 and entered the new Mac Address. The rest was set-up from before. It also worked.
However, IPTV Stalker 9.0.20 doesn't work anymore. I really liked using it in conjunction with iVue Guide. PVR Simple Guide no longer works, but it leans on credentials from IPTV Stalker, so if IPTV Stalker isn't working, it somewhat stands to reason that it would not work. The portal and MAC Address are entered correctly, but both of those avenues produce the all too familiar Authorization Failure.
Beyond that, I can't use the IPTV Stalker add-on. When I try to click on the NFPS folder, I get an Authorization Failure. (Maybe an over-aggressive or poorly executed authorization protocol?)
I haven't proof read this so it may be a bit incoherent, but I wanted to get the information out so you can try to get things going if you're down. Post back and let us know if this route works so others can benefit.