There are many keyword services which sell you keyword volumes for developing your online campaigns.
They are probably worried today. Google has decided to release accurate information on actual search volumes in their keyword tool.
Saw this item on Digg which spilled the beans.
Google Releases Keyword Tool External with Accurate Search Traffic Numbers
Google released its new Keyword Tool External tool which relays Accurate Traffic Data for Keyword Terms!! Learn More
Have a read and grab the data quickly!