I stumbled across this today. It seems that Google Labs now has an
experimental section where you can play around with some of the changes that Google is testing out for future enhancements to search. They currently have four different tests going on at the moment:
Alternative Views for results, is the first experiment, which includes an
info view, which lets you refine the results by image, measurements, locations and dates, a
map view, that plots your search results on Google maps and
timeline view from which you can refine the results based historical values found in the content.

The next two changes are variations of each other and adds a refining capability to the search results.
Search Navigation works like guided navigation where the user can refine their results as they go along.

The final experiment is
Keyboard Shortcuts for the result page. You may not think of this as new but once you play around with it for a bit it is easy to understand how it could be useful for different types of search.

My suggestion is that you sign up for one of the trials and play around. Not only will you be helping improve search but you will gain some insight into what different types of content will be important in the future. Think more details, locations and time-stamping.
I really like the timeline feature and used it just last night to find a old computer game, I played back in the late 80's called Roadwar 2000, after I was talking about it with an old friend I had reconnected with on Facebook.
It will also be exciting to see how Google continues to protect their dominance in search, by having this position it gives them the cash flow to invest in developments like Open Social and Android which only betters their position in the future and it looks like anyone can get a sneak peak through the new labs section. So sign up and start experimenting!