Approach enough college students, and you'll find that many of them make do without all sorts of things - cars, textbooks, food other than ramen noodles. Just about all students seem to carry cell phones, though, and Google's decided to capitalize on this by inviting them to use Google Voice today. To take advantage of this offer, students just need to visit google.com/voice/students and provide a .edu email address. Google will then get back to them within 24 hours,