I'd say a masters in computer science isn't exactly what you want if you want to go into web development. There really is nothing stopping you from starting to

I'd say a masters in computer science isn't exactly what you want if you want to go into web development. There really is nothing stopping you from starting to build a portfolio now. Start simple, some well designed static html/css pages. Then get some jquery in. Then get on a shared host and start with php/python/ruby. I assume if you've made it to hackernews you are slightly technically competent. And if not I don't think a masters program will even admit you and if they did I don't think they'd be teaching you the things you need to learn. If anything I'd suggest a web design program.