They been previewing the new site for the last month or so, but they replaced the old site with the new in the last few days. Quite amazed how many people missed the preview.
It still contains a few bugs which I find annoying… The charts cover a larger area, which is a improvement. I think the graphs are more cluttered now and are a little slower to use (having to click back to change locations ect). So I like the new charts, but not overly impressed with the rest of the site.