I ran across this neat app for websites called SnapVine. It's basically an answering machine you can build into your website and everyone can listen to it.
You click on Leave a Message by Phone and it gives you a phone number and code. You call it, leave your message and it shows up on the web app.
It has a very old school feel to me (like the Pubic Domain) but for everyone on the web (with a phone).
Anyway I added it to AccordingToWhim.com