Google has started a new site called SearchMash which seems to be intended to test out new UI ideas for search results. It’s AJAX-based and currently has web page and image search.
Currently they show images to the right of web page results and the green URLs are clickable menus. When you click on “more web pages” it expands in place, giving you a longer scrollable page instead of a new one, which looks good and is useful.
It appears that they will experiment there so it should be fun to go back every now and then. Nice to see more of