1. Middledigit.net – Top Pages on Facebook
A look at brands using Facebook

2. Web Strategy – What Facebook’s New ‘Engagement Advertising’ Means to Brands
A look at Facebook’s new marketing propositions

3. Techcrunch – Up Close With Microsoft’s Photosynth: Stitch Photos Together Auto-Magically
Microsoft’s neat new Photosynth tool

4. Mashable – Social Networking Trends from Coast to Coast
Social network trends in the US, from coast to coast