Topic: CSS Support

I know that this topic has been covered in many threads but I have to ask anyway.
I am making my website total CSS, so, I need to make sure that the users browser is capable of supporting CSS2.
Does anyone know of a website that will list which browsers and their OS that supports CSS2?

Thanks,
C:\

Here you'll find a comparison between IE and NN:

http://www.w3schools.com/css/css_reference.asp

And here you'll find what Opera 5 supports:

http://www.opera.com/docs/specs/