Probably my favorite Yahoo! Widget is the SIRIUS Satellite Tuner by Tanner Jepsen. He does a really good job keeping it up-to-date and fixing problems that crop up when Sirius changes their online streaming code—which seems to be too often.
Using this widget, I don't need to worry about loading up Sirius' online streaming site and using their clunky interface. The widget behaves just like the actual radio units. Since it's right on my desktop, it's always just a click away. I'm able to quickly fire up Sirius radio in the morning when I start working.
One of the many features it offers is custom skinning. My favorite skin is the Sirius Black skin:
The problem with this skin is that the target area for each "button" was limited to just the visual blue element. This is because the skin only uses the non-transparent portion of the skin images to calculate the clickable areas. This makes clicking some of the buttons like the "1" channel or the "-" (decrease volume) button very difficult to click.
To fix the problem I modded the skin and added a colored background to each button image to increase the target click space. Feel free to download my modification of the Sirius Black skin.