I'm trying to make a mmorpg that can be played on the internet which can send data at least 10 times per second, allowing multiple local and global chat sessions going on at the same time, and storing character names, states, interactions with terrains/players, etc.  

As I'm concerned with the networking part of this program, I want to know whether OpenJMS is a good choice for this and if so, why.   There aren't much sources for this api, so if links for any good tutorials can be provided, I'd be very much appreciated.  

Also, is java.net.* sun api a good alternative?   Right now I'm considering using this package since I so far can't find good tutorials for OpenJMS and for this being time critical (I also have to implement this on my own so I really have to understand what's going on).   I also want to know if this api would satisfy the above requirements.  

As I am pretty much new to network programming, any useful information is greatly appreciated.