Remember that beta means there are still a few things that need tweaking, mainly permissions. But for now, the server is live, open for all! (If you start in the creative server, you can get to YASMP by typing /server yasmp)
The server has Towny and a Market/economy, you can get started with both using this video by Sage905:
Go ahead and grab a buddy, both of you vote and make a total of $1000 to start a new town with /town new [NAME], should only take a few minutes to have your very own town!