So, why would I want to subscribe???
TechNet Plus subscriptions are the best way for IT Professionals to test Microsoft software. Period. Why?
Because with a TechNet Plus subscription you get product keys that are good ad infinitum - a.k.a. forever. So, you can install and test your machines without ever having to reinstall. You'll never worry about losing your investment in that testing environment from an infuriating "The evaluation period has expired" pop up message. You can log on in 2048 and it'll still work. That's assuming, of course, that your hardware lasts that long. :)
Oh, and if you opt to go with a TechNet PLUS Single User Subscription, you'll also get the support database (Think "Q" articles) sent to you on DVD every month. So, you could troubleshoot that pesky Exchange Server bug from the first class seat on your flight to Orlando over an ice cold Jack and Coke, which is a bit better than doing it from your office chair if you ask me. :)
If you want to learn more about TechNet Subscriptions, try this: http://technet.microsoft.com/en-us/subscriptions/bb892759.aspx
To order a TechNet subscription, go here: http://technet.microsoft.com/en-us/subscriptions/bb892754.aspx
Remember to use code: TMSAM12