Very good point - wish I had a good idea to work on! It's not ALL about the money, but it would be nice to have some side income. I think it would also expose me to a variety of different projects, ultimately preparing me for the startup life.
If you don't have an idea burning a hole in your brain, and can pass up the extra income, at least for the moment, you might consider contributing to one or two open source projects.
It'll give you exposure to a new code base, earn you some community good-will, and be a genuine differentiator when you do go looking for that new startup/consulting/whatever gig.
