Voice over?

Can i do voice over (dubbing) in kdenlive? Actually its great piece of software.. But I can't seem to find a audio recording button in this software

This is planed but not yet available.

I'd also like it (for screencasts especially)

does any other Linux video editor provide this functionality?
or how it would be most easy to workaround this?

export to some audio -- edit it with Audacity and then import back?
by the way, which codecs would be best?
as my original screencast is ogv (by gtk-recordMyDesktop)

Thanks in advance :)

ps: I use Ubuntu (Jaunty)