I would encourage you to discuss your idea(s) somewhat openly, in the right audience. IE if you have some club or organization at your school that your idea would be relevant to (either a CIS type group, or a group in whatever "market" the idea applies to) go there and get involved and discuss your idea.<p>Mention to friends, family, professors, etc. that you have this thing in mind and are interested in meeting people that can help/contribute/advise properly.<p>A co-founder is best "discovered" instead of "located".<p>I would also question if you need a co-founder yet, and what function do you want them to fulfill?<p>Focus more on developing your idea (both programatically and conceptually) instead of on starting a company, per se.
I was actually in the same situation as you- unfortunately I'm out of school and seperated from the most important source of feedback/support/cofounders: the people in your program.<p>Anyone can be a cofounder. Most often its friends, or friends of friends, but sometimes its an interested professor(MIT has a long history of this) or random people in your study group that show an aptitude in the field. I would strongly advise you to approach everyone with your idea, explaining what you hope to achieve and the possible setbacks/technical hurdles to come. Ask everyone you know if they know anyone who does something similar. If they come back at you with a few good ideas, or approach the problem from an angle you haven't thought of, then you have a candidate. Eventually you'll find someone as enthusiastic and interested in the area as you, which is perhaps the most important trait, and its a good indication of the type of person who will stick it out and help you change the world.
How to find a cofounder with talent and drive is the hard part. I know a bunch of people who say "sweet idea" when I mention starting a company, but most of them are not at the top of their game or ready to take the process seriously. The people who are already enjoy what they're doing. :(
This may help a little:<p><a href="http://tom.preston-werner.com/2008/11/03/how-to-meet-your-next-cofounder.html" rel="nofollow">http://tom.preston-werner.com/2008/11/03/how-to-meet-your-ne...</a>