There's a nice Ajax-powered feature Google gives their search engine users, it's called search suggestion and it's available (correct me if I'm wrong here) either using the Google Toolbar for either Internet Explorer or Firefox. or visiting the relevant Google Suggest page on Google Labs.

Search smarter with instant suggestions
as you type in the search box

What it does is suggesting a term after you type a character in the search text input area, just one character is enough to activate this feature.

And the Google Suggestions are...

What exactly are the suggestions Google push you? Let's have a look in alphabetical order.

Google Suggestions for A

If you enter the a letter Google returns the following suggestions:

• amazon (489,000,000)
• argos (10.700,000)
• aol (136,000,000)
• autotrader (3,850,000)
• aol.com (41,600,000)
• apple (231,000,000)
• american airlines (32,900,000)
• amazon.com (210,000,000)
• auto trader (2,900,000)
• addicting games (1,800,000)