VMWare's Fusion 3—with full support for Snow Leopard and Windows 7—is out today. Besides being natively 64-bit in Snow Leopard, it lets you migrate a PC to your virtual machine, launches Windows apps like native apps, and more.
It now supports OpenGL 2.1 and DirectX 9 Shader Model 3.0, giving you some more graphics powah in Windows, so you can run Windows' Aero interface with Flip3D (and play games, if you're daring). The more integrated Windows apps respond to commands like cmd+q and yes, work with Dock Expose. It's $80 for a fresh copy or $40 for an upgrade. [VMWare via AppleInsider]