Service for sharing list of installed apps I'm thinking of web app for sharing lists of installed / recommended apps with people.
Optional comment for each app on how/when/why it's useful. Something a bit similar to usesthis.com, but for sharing Android apps and open to everyone. Is there such a service?
AppBrain.

Generically, a user's app list will be at http://www.appbrain.com/user/{username}/apps-on-the-phone.

You can also create other lists to share with the world.