You could actually get a small commercial Knock box and then dump the grinds into a waste basket.
This would not take up much space and would be tidy to take care of.
This is the knock-box I have, and would work well to be cut into the counter without requiring you to customize your drawer. But it works well sitting on the counter too, which is how I use it. I just didn't want another hole in my granite because who knows how I'll use that space down the road. It'll hold a lot of pucks, and what sold me is that the rubber for the rim as well as the knock rod are replaceable through Rattleware.
http://tinyurl.com/65jf33bThere's another real cool accessory that I saw, but can't remember which espresso supply site had it. It was a small SS sink with a built in glass rinser, which would activate when you pushed a glass onto the spout. I thought that would be great for glasses, but especially for the PF and frothing pitcher.
EDIT: here's what I was thinking of... If only my coffee bar had room, I would use this as the sink and mount a small bar faucet right next to it.
http://tinyurl.com/42chr3t