Discovering Web2.0 tools

There are about 300-500 web2.0 tools available online. Amazing! Exploring the web2.0 Awards, I selected the link to the 'short list' for just the winners. Over there, I noticed that a few familiar name of Web site, which we've explored in the past. eg. Technorati, Bloglines, LibraryThing etc. I chose a few new sites to have a look.
1. Ma.gnolia http://ma.gnolia.com/
It's got a sign with a beautiful flower and a word 'Magnolia'. I like the design and it's colour. Also, there are quick links with several little windows, and we can open them by clicking on. There windows keep on changing after each clicking and give people more choices. How clever it is!

2. Lulu http://www.lulu.com/
I like the interface in Lulu's home page. But look around, it just like an online shop. People can sell, buy and even publish their books online by uploading the files. Everything is so easy just clicking the mouse. Continually explored the secxtion of "sell" and " buy", the only thing we need to do is following the simple instructions, step by step.................

3. Judy's Book http://www.judysbook.com/
I typed my city's name in the searching box, but it respond like this " Sorry, we did not understand your location...". So I supposed that it's may only for people who live in the USA. If this is true, then there will be no point for us to use!