Defaulting to public vs private settings is something everyone building an app (or platform) where behavioral data (who, where, when, with whom, to do what) is the potential moneymaker faces.

Interesting however that Facebook after Beacon seems to have taken opposite track, while my full Foursquare checkins show up in Google alerts for my usernames.

Think Buzz is making a mistake here in terms of earning consumer trust, but will the 'average' Google user convert to a Buzz user in the first place?

Wondering about search user conversion rates vs. search+docs/apps/gmail etc. conversion rates to Buzz, and if we'll ever see any stats.