Google are making google suggest, long available at google labs, the default on the main google search pages.
As the name implies, Google suggest brings up a list of possible phrases as you type, auto-completing your phrase for you.
There’s two great posts on this topic, from Jaan Kanellis and Michael Jensen, so I won’t go into to too much detail, but I think that the options that google offers are going to see more traffic, and people will stop typing after two or three words and pick and option from the suggestions. This is pretty significant for SEO, and I think moves the goalposts for keyword optimisation.