Yep, still using VC6 ten years and half a million lines of C++ later. Don't want to, but heavens above, it's a productive, fast and rock-solid environment. I've installed the later compilers and got my gear up and running. Kind of. But the later compilers feel flaky, jerky and brittle. And none of them have ClassWizard, which which you can drive with the keyboard. Fast.
I'll install VC2010 and who knows, perhaps I'll switch. I'd like to, but MS, please make it easy!