Considering the power of the Features module I'm surprised this list of public features servers is so small. Hopefully it will grow. Currently there isn't even a decent image gallery feature on any of these public features servers.

Image gallery Feature for OpenAtrium

Good recorded webinar exploring some ways of integrated large amounts of third-party data into Drupal.

This is the best and most up-to-date thread concerning CDN integration that I've found. The discussion contains a few examples of what others are doing for their projects.

Great overview of how-to use Features

"So remember: don't rely on regions and template files to hide blocks; they do so visually only. Using block visibility settings will ensure that extra processing is not performed on blocks that aren't being printed out in the first place, and keep your server nice and speedy!" See also the comment regarding the Context module and even Panels. Personally, I rarely use the traditional block page these days and rely more and more on the Context module as well as the Panels module in some cases.

Community site for Open Atrium built with Open Atrium

I'll be curious to see this API module in action with other modules, but integration between Salsa and Drupal doesn't seem to have too much momentum.