Microsoft is offering a $100 discount off of the normal price of $349 for a 12-month single user TechNet Plus subscription.
Sign Up here for the TechNet Plus Direct subscription, using promo code TMSAM03.
From the TechNet Plus Overview site:
Allows an individual immediate access to full TechNet Plus resources including software for evaluation, technical content, tools, utilities, two Professional Support incidents and other support resources. Content is available online through the TechNet Plus benefits portal—member-only site. (It does not include media shipments). Each TechNet Plus Direct is licensed to one individual only.
You will get access to unrestricted evaluation copies of virtually all Microsoft products, including Windows Vista and Office 2007, as part of your subscription.
TechNet Plus License Terms (this is a Single User subscription)