While there are many great nonprofit bloggers, nonprofits that are utilizing social media and mobile technology should also be reading the five blogs listed below. Although they are primarily written for the private sector, their writers seemingly have direct communication with companies like Facebook, Twitter, Foursquare, etc. and often provide some of the best inside information about crucial updates and The Next Big Thing:

About Foursquare :: www.aboutfoursquare.com
All Facebook :: www.allfacebook.com
Twitter N/A
Mashable :: www.mashable.com
Mobile Marketing Watch :: www.mobilemarketingwatch.com
TechCrunch :: www.techcrunch.com

What do you think? What blogs from the private sector are great reads for the nonprofit sector? Please post links in comments below. Thanks!