We opened up the Arcade Server recently with a couple of Minigames!
Besides SMP you can now enjoy a quick round of the following minigames on our Server as well:

• BlockParty - With real Music through our web player!
• BowSpleef - To test your bow aim in fun battles against friends!
• Spleef - A true classic in the Minecraft minigames world!

More will be added in the feature, feel free to suggest Arcade additions in the Suggestions sub forum!