and industry observers say it's barometer of what you are seeing here in silicon valley. google announcing last week adding 6,000 people to the work force and what you are seeing is basically three sectors where the hirings are taking place when it comes to social networking led by facebook and twitter. mobilecom putting, the smortphones and the applications on the start inphones, expansion there and cloud computing, any information or data you get on your phone or your pc that comes from the cloud. had a chance to talk to microcopeland, a senior writer of "fortune" magazine saying this is one of the most exciting periods he's ever seen here at silicon valley. >> i think it is on fire in the right part of the industry. google, the internet cloud, mobile, those things are all going like gangbusters. if you are a mobile app developer in silicon valley you can pretty much write your ticket. >> reporter: economic figures of