Atari, I'm not sure that anyone would want more than just 10 users at a time. I know I used to run into problems with my webhost because of extreme server load spikes until they stopped happening, when I was using MKPortal, until I stopped using that.. With IP.Chat, if you have more than 10 users, your CPU use is going to go straight out of the window unless you have a dedicated server. The majority of us are limited to shared hosting or reseller accounts with are limited to the type of resources we can use.
I plan on using it, but at the basic level.