The Windows Live Search Team updated the Live.com Search with a larger index and more power search capabilties which provide increasingly relevant search results.
The video search has been updated using Microsoft Silverlight and now previews the first several seconds of a video clip — from the results page — by rolling over the thumbnail with mouse pointer. The image search results have also been improved to provide details such as image size, url, and image name by rolling over the thumbnail with the mouse pointer.
Live Search for Windows Mobile has also been updated. It now lets you search on business information, maps, gives driving directions, live traffic reports, movie information and theatre information, and gas prices for the local area. The BEST part is that you can now Speak what you are looking for instead of having to type it in! Instead of haveing to select a location from the menus and type in a search term, you can press the “Speak” button and tell it what your city, state is then you can tell it what to search on. It will then provide the results to you.
There is also Live Search 411 where you can call (800-CALL-411) for business and residential listings and will connect you. You can also call and get movie times and listings, weather information, traffic information, etc.
I have personally switched to live.com as my primary search engine about 6 months ago (98% of my searching is dome through live). I noticed a big improvment in results during the summer release and now even more improvements in the fall release.