Adding to its extensive array of web search features (including some new ones I mentioned last month), the Google Weblog reports that there are even more number search options at Google:

• Area Codes, e.g. 650, bring up maps.
  
• UPC codes, e.g. 073333531084 or 036000250015, bring up some information about the product.
  
• Flight numbers, e.g. usair 50, provide links to flight tracking
  
• Vehicle ID (VIN) numbers, e.g. JH4NA1157MT001832, link to a CARFAX report on what kind of car and its status.
  
• U.S. Postal Service tracking numbers link to package status.