A: the CSS z-index of the sticky arrow is set to 9999, so it should sit on top of everything. If it doesn't, it could be that your widget or other content has a z-index of 9999 also - in that case, set it to 9998 or less.
A: YES! Not only does it work, but the loading of the sticky arrow is specifically optimized for the Genesis hooks and initialization if you are using a Genesis child theme, meaning faster load times.
A: If you're interested, you can find out more about Genesis and StudioPress here: http://goo.gl/hE5B7F Even if you already have Genesis, I would highly recommend the Minimum Pro theme - I use it for nearly all my clients because of its flexibility. You can find it here: http://goo.gl/Qsy1xn
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