i have been working as a quantitative analyst for about 8 years - with a few years as a software developer mixed in (developing a model specifically for my industry in vb.net). my degrees are in math (BS) and economics (MS), so i have picked up some programming along the way. i would like to pursue some jobs involving more programming, but am hesitant to get another degree. should i consider certifications? if so, which ones are more valuable - sun, microsoft. are there others i am missing that would be perceived as valuable? thanks for the advice!