It's almost too predictable. Technology, a cyclical industry, heats up, and hysterical warnings of a tech bubble follow like clockwork. Whether the bubble is early stage, about to pop, dangerous, natural, or even real, is a source of constant debate. But one aspect is undebatable: technology is driving the job market, especially in Northern California. The state's unemployment rate for March was 12%, higher than the national average of 8.8%. Yet hiring in information technology jumped 5.3%, led by companies like LinkedIn, which added 800 employees over the last year.