Google are making a big change - Google 2.0: Google Universal:
http://searchengineland.com/070516-143312.php
http://www.marketingpilgrim.com/2007...algorithm.html
It's only migrating across Google.com at present, but is bound to crash Google UK very soon.
The question is how much will users get out of it - and how much of a problem it'll prove for SEO's.