Awesome. I think the format (picture feed) has the potential to work across a bunch of verticals - movie posters (to get movie recommendations), art (to get gallery recommendations), food, etc.

Pixel art is a great choice. The emphasis is on creation and expression - and maybe it hits a sweet spot - it requires more work than instagram (making it more legitimate as an art/craft) but less than creating the mona lisa...

You should get eBoy to use it: http://hello.eboy.com/eboy/