For those of you who have been trying to build client-side GData mashups but have been thwarted by the same-origin policy, we have some good news for you: you can now get public Base, Blogger, and Calendar feeds as JSON! This means that you can start displaying GData in your web page with a little JavaScript.
I thought I might point out just a few of the easily-missed improvements the new site offers beyond the great new love-it-or-hate-it visual redesign that seems to have occupied most of the discussion I've seen so far
"Over a year after Google shot down their SOAP Search API they released a JSON based one supporting "Flash and other non JavaScript environments". Strange requirement that an HTTP<sep/>
"You can use JSON feeds at del.icio.us to fetch, remix, and mashup a variety of data for use in your own custom applications and browser-based presentation styles."