YouMail lets you assign customized voicemail greetings based on who’s calling. Finally. Yes. I love it. It’s touted as a service that let’s you "express yourself to friends and family while remaining professional to unknown callers."
I made the mistake of assuming that taking out a Home Equity line or credit from Wells Fargo wouldn’t result in them calling two or three times a day trying to sell me other stuff. Now, whenever they call they’ll hear "Hey Wells Fargo, go fly a kite with a hole in it! Ha! Seriously, stop calling and pretending there’s something really important you want to talk to me about. I’m on to your game. Drop dead. Love, Doug!"