On WordPress-dot-Com, still not sites showcasing the deployment of Post Formats, but a nice table of 50 themes, with their various sub-sets of the standard list of Post Format choices:Enhance Your Site with Post Formats

A simple way to add visual variety to your site’s front page is to publish your content using Post Formats. Over 50 of our themes support Post Formats, which means they can display various types of content — including images, videos, quotes, links, audio, and short snippets called “asides” — with different formatting, adding subtle but nice touches to your site.

Some useful 'de-abstraction' going on in this page ...