The supporting apps have been removed so downloading it from market will result in the error indicated.
I did not have any plans on supporting Verizon apps or making a patch for it but considering your circumstances I will make a patch and post it so you can track data. I feel that is a reasonable request. It will, however not be backed into the ROM but left as a patch in the CleanROM folder going forward. I will try to get to it in a few hours when I get off work then I need to keep working on some Thunderbolt stuff...
Those that dont know I had a Thunderbolt donated and released the first version of CleanROM 1.0 for it. Its tight! Check it out!
Some people have great battery others horrific. ICS is hit or miss for some. My overall battery run time did diminish but is not worth even noting. Other people have had improved RUN time while others have had significantly decreased.
At this point I think its minor variations in hardware, reception, towers, etc. But I have never figured out an exact answer as to why. And I am sure HTC is trying to figure it out too, lol
Hope that helps. Oh and you can always go back to GB as well.
-Scott