Something

from twisted.internet.protocol import Factory, Protocol
from twisted.internet import reactor
from twisted.protocols.basic import LineReceiver

class QOTD(LineReceiver):

    def connectionMade(self):
        #send welcome message, add user to ram
        self.sendLine("Richies Telnet Chat, Powered By: \
Python http://www.python.org, Twisted http://twistedmatrix.com\r\n\r\n\
Please type a username to begin:")
        self.factory.connections.append(self.transport)
        self.factory.username[self.transport] = ""
        
    def lineReceived(self, line):
        
        if self.factory.username[self.transport] == "":
            #set username
            self.factory.username[self.transport] = line
            self.sendLine("\r\nSet Username, You may now chat! Type !userlist for a userlist.")
            
            #send connected msg
            for clicon in self.factory.connections:
                if clicon <> self.transport:
                    clicon.write("%s has Connected\r\n" % (self.factory.username[self.transport]))
                    
        elif line.lower() == "!userlist":
            strusrlst = "\r\n----------\r\n"
            for usrlst in self.factory.username:
                strusrlst = "%s%s\r\n" % (strusrlst, self.factory.username[usrlst])
            strusrlst = strusrlst + "----------\r\n"
            self.sendLine(strusrlst)
            
        else:
            #send to all clients
            for clicon in self.factory.connections:
                if clicon <> self.transport:
                    clicon.write("%s says: %s\r\n" % (self.factory.username[self.transport], line))
    
    def connectionLost(self, reason):
        #send disconnected msg
        for clicon in self.factory.connections:
            if clicon <> self.transport:
                clicon.write("%s has Disconnected\r\n" % (self.factory.username[self.transport]))
        
        #cleanup user from ram
        del self.factory.username[self.transport]
        self.factory.connections.remove(self.transport)
        
class QOTDFactory(Factory):
    protocol = QOTD
    def __init__(self):
        self.connections = []
        self.username = {}
reactor.listenTCP(8007, QOTDFactory())
reactor.run()