I think the redesigned Google Fonts site looks fab and I love that you can now change the background/foreground colours, very nifty! That said, there do appear to be some rendering issues on browsers other than Chrome, which is unfortunate as I’m a Firefox user. I hope the developers fix these issues soon as I much prefer the new design.
Also, see Reimagining Google Fonts for more information about the redesign.
UPDATE: The rendering issues appear to be fixed now.