To me, it would make more sense for the 'busy' icon to be used for away instead of the 'idle' icon. I like the overall look, though.

This has quickly become one of my favorite status icon sets. I like it because the icons are easily distinguishable by color *and* shape.

The only thing I *might* change about it is to try to remove the bar from the Offline icon.

I'd like to see an alternate version with a bar on the 'away' icon and a clock on the 'idle' icon, as in the dock icons. Some people might find that more cluttered, but I find it easier to distinguish the icons that way (and I imagine anyone with red-green colorblindness would find it useful too!).