You can download the desktop version as a stand-alone app or use it with the iPhone, Treo, etc.
It's not the prettiest mac application but I think it gets the job done. I originally used it first when I was on Treo many moons ago. Then when I switched to the iPhone I really missed it. As soon as they came out with the iPhone version, I bought it immediately. You have to sync the iPhone and your desktop through a manual process but it's pretty straightforward once you do it.
It's not integrated with quicksilver though, but I don't know if you want that sort of info easily accessible outside of the app.
http://www.splashdata.com/splashid/download/iphone.htm
You can download the desktop version as a stand-alone app or use it with the iPhone, Treo, etc.
It's not the prettiest mac application but I think it gets the job done. I originally used it first when I was on Treo many moons ago. Then when I switched to the iPhone I really missed it. As soon as they came out with the iPhone version, I bought it immediately. You have to sync the iPhone and your desktop through a manual process but it's pretty straightforward once you do it.
It's not integrated with quicksilver though, but I don't know if you want that sort of info easily accessible outside of the app.