Just to let you all know that I found a way to have a chat in Multiply. I posted a link for a private chat in gabbly.com; you need to register your name in gabbly.com and get verification, and once you do get that, click on the link I posted under Links in the main page on Multiply. It takes a while to load, but once it does you can drag the chat box across your screen, and down to block the background. Its very simple to use.
Let me know if you have any problems.
Thanks
Judy