Dweber, we want you to get the voice mail notifications! Can you try this: http://vz.to/1z1Tvhs Make sure you also clear data.You can also put the phone on safe mode to ensure no 3rd party applications are causing the issue by going here: http://vz.to/1z1TLwK I would like you to reboot and tell me if you can get your voicemail notifications.
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Touch the button that says turned off to enable the application.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
Just out of long-shot-in-the-dark, have you made sure that no changes were made to your features in My Verizon?---Manage My Products and Apps? I know it was a feature I could enable/disable a while back, but my plan and device might give me different options than you may have.