This is a bold move as I have not tried it yet but I was looking at an IEEE student membership today as rates have dropped to half price (which is currently $12.50/£10). The IEEE is the Institute of Electrical and Electronics Engineers and they aim to advance technology through engineering. They are responsible for things like Firewire and 802.11a/b/g/n (wireless communications standards) and a whole host more, see their website for more info.
Whilst looking at there student memberships I noticed that they give you access to the MSDN academic alliance suite of free software, which currently includes a huge amount of top of the range of development tools but also operating systems such as XP, Vista, and Windows 7 Ultimate RC. This software is free through MSDNAA so once you are a member of the IEEE you should have access to a fully licensed copy of Windows 7 Ultimate plus whatever else interests you from the suite of products available.
Looking at the terms you need to be studying 50% of a full time academic qualification undergraduate or graduate which is relevant to IEEE. 60 points per year counts as your 50% of full time and hopefully a BSc in computing is relevant. I fully plan to join this in the coming days as Windows 7 releases RTM on August 6th 2009 and should be available on MSDN shortly after.
I'll let you know how I get on.