Web 2.0 for dummies

I found this tutorial website for Web 2.0 to be interesting.  It describes various graphic design techniques that are common in Web 2.0.  It explains why, when, how, and where to use them and also gives you tips on what not to do.  It has a very basic layout (which emphasizes their first point – be SIMPLE) and it is very easy to follow.  If you are looking at creating your own Web 2.0 site, this is a great starting point for some useful tips on what to do and not to do.