It's difficult to hear the effect of the effect because of all the other effects, most notably delay, on all the clips. I'm not knocking the playing. If the purpose of the clips is to demonstrate the stompbox effect, it would be nice to hear them alone. A voice introduction describing the model of guitar, amp, and pedal settings is always nice.
I really haven't been trying to showcase particular effects so much as to record the tones that I personally like in contexts that I personally appreciate.
I don't usually take the time to just record dry sound samples of pedals simply because its a pretty boring task and I generally don't have too much time. I definitely appreciate the contributions of people who do that, however.
As for the Keeley Comp, I recorded that into a tonelab, and I pretty much always have delay and reverb set up on the tonelab. The keeley comp is on a few other tunes too - ParaComp.mp3; WhtXmas.mp3; etc. I pretty much just used it with the sustain as high as it would go all the time.
As for noise, the Keeley amplifies hiss that I assume is already in the signal somewhere. It seems to do that a bit more than the ross side of the Analogman CompRossor that I have, but it also seems to provide more compression than the analogman. I don't think the Keeley makes more noise than would be normal for a compressor like that. If you take a listen to http://www.inrerocknroll.com/tunes/KComp.mp3 - the hiss that you hear in the very beginning as compared with the clean signal is pretty much what you get with the keeley comp maxed out.
The ADA I have is a reissue with the built-in power supply. I love the sound of it, and its very quiet. It has a built in noise gate that doesn't operate on the entire signal, but rather cuts off the effect at a given, adjustable point - it's great because there is no background flanging or flanging of the hum and noise in your signal.