Hmm, not sure what "double bursting" means. The IR LED is your basic flashlight -- you can turn it on and turn it off. There are no power settings that I know of. (And the timing of IR codes is fixed -- if you try to run them faster or slower, the target device will simply not understand what you are trying to say...)

Well, LIRC config files are themselves keysets, written down in a format that the LIRC server can understand. That particular keyset is using the standard "NEC" protocol, so it'd be easy to put into Pierogi as well; I'll go ahead and put it on my list.

I'm not much of a UI guy, so I'm not sure what kind of widgets would work for this sort of thing. Pierogi, as it stands right now, is a bit complex for use as a widget, I would think. Still, I've got the IR device code almost completely separate from the GUI code right now, so it'd be easy to make a different front end for the app (or, for that matter, to port it to other hardware). It shouldn't be too hard to morph the program into some other form...

I'm pretty sure that already exists! I think it's called tv-b-gone or something like that...