I'd like to see that, as well as time-related voicemail. For instance, if someone calls me after midnight on the house line, I'd prefer that it goes straight to voicemail. It'd be even cooler to have a VM message that says "It's too late for us to answer - leave a message" and then revert back to the standard home message in the morning, after 8 AM.

Just random, but I think it'd be neat. Not sure if anyone else would get use out of a feature like that.