Sparrow chirps out feature list for version 1.1
www.tuaw.com/2011/03/15/sparrow-chirps-out-feature-list-for-version-1-1
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Excited to give this a try now that it supports generic IMAP accounts.