I've been the maintainer of an integration module for phpFreeChat since Drupal 5. I ported it to Drupal 6 with no problems, and I tried to port it to Drupal 7, but it hangs when the chatbox starts to load.
phpFreeChat's use of jQuery is extensive - 2 dozen files - and it relies heavily on AJAX. I can't see how to apply the new instructions in Drupal 7 to get around the compatibility problems it introduces to this module. It seems like I'd have to rewrite the entire chatbox program.
If it's possible to port this module to Drupal 7, I'd like to do it. But it appears to me that it's not possible. Maybe, though, I just don't know jQuery well enough to see how to get around the problem. Can someone advise me?