We're going to try using IRC! In the future, it may be linked with chat in the server, but there are some issues to take care of first. Use this web client to connect, but we recommend using an IRC client. Server: irc.esper.net Channel: #skcraft Windows users can use HexChat (select EsperNet as the server, and enter a nickname). Note that this server hosts many channels and therefore your name may be taken. Mac OS X users can use Colloquy. There are also numerous IRC clients for Android and iOS.
IRC is my fave. Back at bukkit its one of the most useful things! Looks like I arrived here at SKcraft just in time for it is discover this useful tool
HexChat is also available for most Linux distros, I know there are at least a few Linux users in the community.