What are the available voice recognition packages for PCs?

Xbox Live is an online multiplayer gaming and content delivery system supporting voice chat through a headset, bundled with the Xbox 360 premium package, with the Xbox Live starter kit, or available separately. The Xbox 360 headset is not bundled in Australian packages, however it is bundled with Xbox Live 12 Month Subscription retail kit instead. The service includes a friends list of other users, as well as a mail-like system of either text or voice messages in which the user can take a picture with the Xbox Vision Camera and add it to the message to send to an online or offline user.