comScore released its monthly Media Metrix top 50 revealing the top 50 U.S. web properties. Here are the top ten:

1. Google sites
2. Yahoo Sites
3. Microsoft sites
4. Facebook.com
5. AOL
6. Glam Media
7. Ask Network (IAC perhaps?)
8. Turner Network
9. Fox Interactive Media
10. Amazon Sites

Google has acquired Angstro, a social startup that is said to be key to the company’s social strategy going forward. More on this here.

SCVNGR, which reportedly raised $4 million from Google Ventures in December, has now launched support for Facebook Places. As Jason Kincaid notes, the company has had a big week with a partnership with AT&T and the release of its secret social mechanics playdeck.

Speaking of location-based games, Foursquare has tweaked its apps. The Foursquare team writes, "When you’re getting close to winning a Mayorship (within 10 check-ins), you’ll now see how far away you are from ousting the current Mayor. You’ll see the count in the post check-in screen when you check into a place. Take it for a test drive tonight and see if it fires up the flames of competitiveness for you!"

Microsoft co-founder Paul Allen has decided to sue most of the Internet – 11 prominent companies at least. These include Google, Facebook, Yahoo, Apple, eBay, and Netflix. TechCrunch obtained statements from Facebook and Google regarding the suit. Both indicate the suit is without merit. Surprise.

A class action lawsuit has been filed against Facebook alleging that the company is misappropriating the names and pictures of minors for profit. Here’s the press release on that.