This ActiveWord will query the new Wolfram|Alpha Computational Knowledge Engine. Execute the ActiveWord and this dialog appears, enter the search term, ActiveWords will launch your browser with the query entered in Wolfram|Alpha. It's early days for my use but so far just the city & date searches have been very useful.
Create a "Navigate ActiveWord" with this URL in the action field:
"http://www.wolframalpha.com/input/?i=<INPUTBOX:"Ask Wolfram|Alpha:":Ask Wolfram|Alpha>"
UPDATE 2009-05-22: I've added the missing "|" to Wolfram|Alpha in the code but not updated the images