If there are any Uni College students in the UK. Microsoft will be selling 7 for £30 to students, all you have to provide is an authentic college/university email address. Otherwise, if you are on a Computing course (like myself) Microsoft allow Students free access to just about all of their products for free. That is how I got my copy of 7.
If anyone here is annoyed with Vista or had any problems with Vista then you will love 7. After playing round with the OS for a few hours it certainly runs a lot smoother and does things a lot faster than Vista. It is not the memory hog Vista was.
The only slight inconvenience was having to install Firefox onto a USB stick on my old PC and then load it onto the laptop through the USB stick. This is because by EU law, Microsoft are no longer allowed to sell OS in the EU with Internet Explorer. So be sure to have a way to install a web browser onto windows 7.