Adobe knows your copy of Creative Suite 4 is "borrowed" from a friend. A friend you randomly met on the Internet, whose name you don't know and probably never will. Fortunately, they're doing something about it, so long as you're a student.
If you're a student and you head to the Update Adobe website, you can grab up to 40% off the price of Adobe creative software. According to Adobe, the saving will help you: "Create, cash-up & beat the pirates with Adobe". I'm not entirely sure what the incentive is for students to "beat the pirates" though – maybe Adobe is secretly training an army of design ninjas? In any case, it's a pretty good saving for those of you still paying for education.
[Update Adobe – Thanks Ben!]