Try it out!
		If you have not done so already, create a bulletin board similar to the example. It doesn't have to have all of the options, such as login and logout, but that would be nice. Once you've finished that, take some steps to improve it. Perhaps make a chat application. Add some controls around login and logout.  Force users to login before sending a message.  Ensure that login names are unique. Create a more complex message object. Make more methods.  Perhaps a method that will 'beep' a selected user. Consider adding security.  Digital signatures, encryption, etc.