Just out of curiousity, today I odin'd back to LEN, then wiped the phone from the /settings/privacy/factory data reset. I rebooted the phone and installed pandora and it worked. I restored my previous nandroid, pandora still worked. I updated to lg8 modem and firmware pieces, pandora didnt work. I odined back to len, installed my lg8 rom, but didnt update the modem pandora is working. I am so glad I found a solution for my pandora. Hope it works for others.
The thing I have noticed is that the data signal is real spotty with lg8. I did a speedtest with lg8 and got like 548kbs down, and it was up and down. I then did a speedtest in the same spot, with the same rom, with the LEN setup and got 1010kbs down, with a smoother signal. Im guessing that the signal on the lg8 is too spotty to establish a good connection, so it thinks its connected, then the signal drops, then reconnects, then drops, then reconnects, etc. so the buffering cant complete enough to stream.