I went back to school in my mid 30's to become a programmer, so I don't think age really is a factor. I would, however, recommend to anyone to pursue a bachelor's degree regardless of your age. While some companies aren't as picky about degrees, most of the companies I have worked for and the recruiters I have talked to all have said that a resume that doesn't have at least a bachelor's degree is more likely to be passed over. Or, at the very least, it will be a low priority and will be weighted as less than those that have the higher degree. Can you make it without the bachelor's degree? Sure, but if you get one you are giving yourself better chances.
And you should certainly be looking for jobs anyway. If you can add a year or two of work in the field, even part-time or internship level work, you will be light years ahead of all the snot nose punks who graduate with you but have no work experience. I was able to find a level I programming position during my senior year. As a result of having nearly a year of experience plus good grades with my bachelor's degree, I had already gotten a post-graduation job nearly two months before I graduated.