Eager to start playing with OpenGL 3.2? Probably not unless you're a developer. If you are, though, you'll be happy to know that Nvidia has already released graphics drivers with "beta support" for OpenGL 3.2 and the matching GLSL 1.5 shading language. That didn't take long, seeing as Khronos announced the spec just yesterday.
The drivers support GeForce 8 or higher graphics cards on desktops and notebooks, plus corresponding Quadro FX workstation GPUs. Nvidia touts support for all OpenGL 3.2 and GLSL 1.5 features, with two exceptions: "geometry shaders as part of the core," and the GLX_CONTEXT_PROFILE_MASK_ARB attribute value in glXCreateContextAttribsARB().
You'll find more details and a little frequently-asked-questions section on the official Nvidia Developer Zone driver page. Oh, and download links, too. Nvidia provides drivers for Windows 7, Vista, and XP, not to mention Linux, Solaris, and FreeBSD. If you're curious, the Windows release version is 190.56—a whole 0.18 better than the latest WHQL release.