Commands

Search engines: including sites, blogs, academic, people, news, pictures and video.
References: Wikipedia, Google Books, Wiktionary, Answers.com, Internet Movie Database, World Factbook, Dictionary, UrbanDictionary, Quotations, Acronymfinder and share price.
Translation between numerous languages. 
Conversions between currencies and other units.
Go via Google Lucky, URL and Skype. 
Copy text plain or with URL. 
Print page or selection. 
Shop at 8 Internet shops including Amazon, eBay and iTunes. 
Email with your desktop email program or via Gmail & Yahoo! Mail. 
Tag with 6 different taggers and search. 
Blog with Blogger and WordPress as well as blog search with Technorati, IceRocket and Clusty. 
Blog subscribe with My Yahoo NewsGator, MyAOL, Rojo, Bloglines, NetVbes & Google.
Look up maps, local time, weather and package tracking. 
Page Information about the page you are looking at including what pages link to it and who owns it. 
...all in a single click!