I called my friend one time and her machine said, "Hi Koda, [insert friend's name] isn't here right now." I was like, "WWWHHHHAAATTT?!?!?!?!" That was so cool! She told me it was from this thing called,
"YouMail". I was looking into it and it is THE coolest voicemail system and IT'S FREE!
They have everything from goofy answering machines to professional ones. You can make one on your computer and upload it to the site! You can even dictate who hears what message.

I think you can dictate when certain messages are heard too. That might be the Premium service though. Anyway, I just thought I'd share.