Make your multi-level comment replies show on demand with a slick jQuery slideToggle() action.
None at this time.
Given that this is free, I offer limited support. If you have issues with the plugin working I will do whatever I can to help you fix the issue, but when it comes to customization, I'm in limited supply. I'll do what I can, but no guarantees. This is your standard "as is" application. In all honesty, ask customization questions in the forums - if I can't help, perhaps someone else can. (If you want to hire me to customize it, that's another story - feel free to contact me to do so!)
PLEASE NOTE that the WordPress support system DOES NOT notify me when someone leaves a support question. It requires me to come back and check manually to see if anyone has had an issue. Sometimes, I don't get to do that for a while. If you left a support request on the forums, and it's been at least a week since you left it with no response, please drop me an email to let me know so I can attempt to help you out. I'm pretty good at helping out - but I'm not so good at coming to check the forums - especially when I'm busy with client work.