As the old FlashChat script has caused us a lot of headaches, the action has been moved to the #tantalism channel on irc.bondage.com.
IRC is an old chat protocol which is perhaps a bit different to what you're familiar with. There are plenty of guides to help you get started, such as these ones.
You'll need to get an IRC client to get into it. Some of the popular ones include:
Once you've got one, you can go directly to irc://irc.bondage.com:6667/tantalism, or manually connect to irc.bondage.com, port 6667, and join the #tantalism channel.
There's also a simple little guide for getting into bondage.com IRC using mIRC here.
At the moment, this is better than nothing, and takes all the load of the chatroom off our server, as well as the potential for destructive attacks. Sorry if these are some awkward hoops to jump through, but it's probably the best alternative right now.