Trick your iPhone voicemail into using voice recording data

The other day, I discussed how to record audio on your iPhone. Several people wrote in asking whether they could have their recordings show up in voicemail, so I scouted around a bit. I discovered that voicemail is stored in ~/Library/Voicemail and that it uses an sqlite3-compatible database to manage that information. Last night, I put together a shell script that allows you to trick the iPhone