I've used 123flashchat for the last couple of years on OohYa Chat and in my opinion is one of the best commercial chat software solutions out there.

In response to the support comment above, you really won't get very far asking the live desk sales support when it comes to technical issues. You really need to contact support@123flashchat.com where in my experience they have gone above and beyond to help us with technical issues, including integrating Joomla and community builder profiles with the chat software.