For any would-be programmers/tool developers out there, the release client for Microsoft Visual Studio 2010 is available for free. You can also get the betas. Visual Studio is the leading development environment for Windows, so if you ever wanted to teach yourself programming and develop the new map editor, I'd recommend you get your hands on this.
The professional versions of VS cost $500+, so if you even think you might want this at some point, I'd suggest taking advantage of the free offer. The catch, however, is that the RC is time limited: it will stop working on June 30, 2010.
http://msdn.microsoft.com/en-us/vstudio/dd582936.aspx
Spoiler Alert, click show to read: