Mashable talks about Foursquare

Mashable touts Foursquare and other location based services to go mainstream this year. This popular location based social networking service, has a iPhone application that has caught fire as of late. 

Facebook posts about photos this week

The last two posts on the Facebook blog have dealt with photos. First, a new feature allows users to upload photos via email. Secondly, there were some rumors that Facebook was letting third party advertisers post your photos without your permission. They then wrote a lengthy post about how this is not true and explained how they only way they do use your photos is to let your friends know what pages you have fanned.