It's an excellent site Penny and no, I hadn't posted it.
The examples are superb and show what you can achieve while still being good in terms of accessible code.
They are also far over and above the level of most CSS use but, nevertheless, the way in which they are explained and the sample code helps to demystify things for those new to the subject.
For those who want a CSS layout but haven't a clue where to begin, you could do worse than try the online CSS generator click here which does what is says on the tin. You select a bunch of options for you page and it generates an appropriate CSS code snippet to perform those selections. It's an excellent way to see how CSS goes together and you can play with it, break it and put it back together again.
A Google search for CSS+tutorial will turn up more information than you know what to do with, but you'd be hard pushed to find any better examples of imaginitive use of CSS than those on the site Penny has linked to above.