I like that SK constant reader!!
I'll give you this tip: my friend works for Netflix and was responsible for switching from the white on red to the red on white icon for phones and tablets. There was ridiculous research involved that suggested the white on red was too similar to YouTube and users would sometimes select the wrong app at a glance. You want something that you don't have to read/look at closely to identify the app. For that reason, I suggest you consider something REALLY simple for the icon image.
This is incredible and I am SO looking forward to using it! I've struggled with cataloging my King collection on shelfari, in word documents, etc. It will be incredibly nice to store it this way. And will we have the option to share our collections (I may have missed if it was already discussed) so next year's Secret Santa will be even more interesting?