Minecraft Dedicated Server Host Suggestions

I've been thinking about setting up a minecraft server, since I don't know how to setup a DMZ and it would be better for the server to be online 24/7.
Did anyone watch Notch's livestream on Machinima? I checked the prices of the host and they where pretty good, but I can't remember the name :(
Anyway, I'm looking for at least 20 players on this server. :)
 

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