I don't really use Audacity, I just use Camtasia for everything. If you want sidebars, there's plenty of tutorials on youtube, that's how I figured it out. BTW if you're doing custom sidebars, Photoshop is a BIG help. Audacity + Camtasia = pretty much it though unless you're looking for something extra special.
I just want to ask you something. ^_^
I know that you've made a few Let's Plays, and I want to get into that sort of thing and I don't know what I'd need. I know I need the audio recording software, which I've got Audacity for, and I can use Camstudio for recording, so is there anything else I should be looking for?