On many very large IT developments - particularly in the public sector - there is a requirement that the project managers have Prince 2 certification. Contrary to some of the rather silly comments above, Prince 2 sets out an incredibly useful approach for managing large and complex projects.
However no one is going to get a job as a project manager just by having the Prince 2 certification - particularly on a large project. You need to have real experience to back up the certification, and most of the principles in Prince 2 are ones found in other project management approaches.
I wouldn't bother going doing PRINCE at this stage unless you definitely know that you
a) Want to go into Project Management

Are likely to be working on projects where PRINCE certification is a requirement
c) Already have some project management, or similar, experience
Instead I would get some books from the library or any good book store on basic project management principles and read up on them so you can talk confidently about the key stages in an IT project. Also most medium and large IT companies will provide you with training on project management if that is what you are interested in once you've got a job. Very few will expect you to have forked out for your own PRINCE training.
You should also be aware that good PRINCE training is expensive - £1200 + VAT for a course leading to certification. However you might be able to negotiate a discount if you are a self funded individual.