Lunchclub - Curated 1:1 professional connections
Inside.com - Real news, curated by real humans
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
Email Tuna - Explore newsletters without subscribing
Lunch Roulette - Collaboration by grouping coworkers randomly for lunch.
Nuzzel's Network of Newsletters - Easiest and fastest way to curate an email newsletter