Updates to Team Fortress 2 have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

• Added the Itsy Bitsy Spyer
• Added a "Buy Now" feature that allows item purchases on the web
• WebAPI changes:
  • Moved IEconAssets/GetAssetPrices to ISteamEconomy/GetAssetPrices
  • Added new web API ISteamEconomy/GetAssetClassInfo for getting descriptions of items