I currently go through big red, and want to utilize this:
Old Spice Voicemail Message Generator
to make a voicemail greeting.
I haven't been able to find any way to do this (possibly due to the actual greeting being on the verizon servers), other than holding my droid up to some speakers, which makes for terrible sound quality.
It might take some real creativity to figure out, or it could be something simple that i'm overlooking