Thank you, I personally think its a great Idea. Even if I like to go to conferences, you can't go everywhere and its pretty cool to listen to some talks at home.
I just listed to "Automated Testing - Class::DBI" and it was easy for me to follow the presentation together with the slides, but I could imagine, that it's pretty hard to follow the speech if you don't have the slides in front of you.
Really nice would be if the slides would change like they did during the presentation. There are many ways I could imagine how you you could do that pretty easy.
1. Using a FullScreen Capturing, which works everywhere but produces quite big files.
2. If the Presenation is HTML based, you could use something like HTTP-Recorder which would record the session automatically. You just have to start the audio presenation at the correct time.
Do you think this would be useful?
ciao
Philipp