Worio is a new search engine (beta) that I just heard about on the excellent blog, Free Technology 4 Teachers. Worio is interesting w/ the way that it handles searches by working "hand-n-hand" w/ keywords to give you the best results.
For example, when you search using Worio (you can also default by Google, Yahoo, MSN, etc) it brings up your hits on the left; on the right you see your related results w/ suggested terms. This is what makes Worio unqiue and probably it's most useful feature.
There is a Web 2.0 component to Worio as you can register an account and then create your own searches, add friends, and Worio customizes itself to give you the best "searching" experience.
Below is a search using "technology integration" notice the difference from the left/right sides!
For more info click here.