Sorry if I am repeating an answer from above, but I have to recommend an MSDN subscription.
I would say the best route to get this is sponsored by your company, On your MSDN subscription you’ll get unlimited server licenses for “non production use”.
There are other benefits to getting an MSDN license, here are just a few:
1. 24/7 Microsoft Conciege Support Chat – I have had very good experiences with the support guys, they’re actually not your typical help desk staff, and can communicate in perfect english, and also seem technical, almost like you’re talking to another developer, or at least someone very technical, I would say without a doubt, the highest level of technical support I have yet to recieve for “free”
2. Access to managed news groups, for even more technical questions, these groups are monitored by Microsoft development teams, and you’ll get a technical answer within 2 working days.
3. Downloads of all Microsoft Applications, Development Tools, Server Products, Operating Systems, Design Packages, SDKs etc, but there is more, just a quick change of the language option and your able to get these applications in the language of your choice, if its available. For example – Germany Office 2007.
I know its not exactly cheap, and for most people its not something they would consider buying, but if you can get your company to get an MSDN subscription, you’re set!
