I own a server. It is publically hosted. So this world will never get lost or we won't start a new world. This server is whitelisted. So put your minecraft username and I will message you the IP. Only the first few people get in. Don't post if you don't play.

How to download and use snapshot:

Goto mojang.com and download latest version [ Register or Signin to view external links. ]
Put that downloaded jar in your .minecraft/bin folder and replace the existing one.
Run minecraft and join the server!