OmniGrowl 3.4 released

This started out as a minor revision but wound up being a huge revision. We got rather obsessed about it, actually. The biggest changes are support for coalescing, adding over 100 preset RSS feeds, and including custom RSS icons for almost all of them. Growl coalescing means that for "stay on screen" notifications, newer ones of the same type will in most cases replace older ones. Please see the version history for details.