Despite the number of unemployed right now, jobs in the field of Technical Communication are abundant. Take, for example, the jobs listed on the Lone Star Community's job bank. I'm not really looking for a job, yet recruiters are practically knocking down my door, phone, and inbox to inform me of the latest tech writer job.
Check out this graph from indeed.com showing that "technical writing" has it's ups and downs, but has generally been on the rise.
Although the jobs including "technical writing" have been decreasing for the last six months, we're still doing much better than Fall '07-Spring '08 as well as Fall '08. Keep the faith: what goes down must come up.