Flash is so dead. HTML 5 is the future. And websockets. And webservers that support hunderds of thousands of parllel processes. the flash client is unmaintained and is ugly. You can still get the git at http://www.hcesperer.org/flashychat/ircclient.git
If you want a webchat, check out qwebirc. If you are looking for an irc network to run your channel in, check out the webchat at evility (evility as in bsd, not evil).