Thats right... /vote is working again in game. When you use the /vote command, it will display a list of minecraft voting sites. When you visit the sites, enter your user name and hit "vote".
This will update back at the game server and you will recieve a "vote point". You can spend these vote points for things like diamonds, gold, iron, etc. Next time you login, try /vote and click around a little to get use to the menu. :)
Let me know if you have any questions