This is an excerpt that comes from a "live-chat" session I had with the HP sales folks this morning:

Hello, you are now chatting with Jennifer.

Jennifer: Thank you for holding.

Jennifer: This is Jennifer in Colorado Springs and I will be happy to help you today. It will be just a moment while I read your previous comments so you don’t have to repeat yourself.

Guest: Hello Jennifer

Jennifer: How can I help you with the 2133 today?

Guest: I am wondering if it is available with the Windows XP operating system rather than Vista?

Jennifer: The 2133 will not be available with XP until May 15th.

Guest: That's OK - do you know what the part number will be? Is it available for pre-order?

Jennifer: We do not have a part number yet, and it is not available for pre-order at this time.

Guest: OK - well, then I'll check the HP order website on May 15. Thanks for your help!

Jennifer: Thank you! Have a great day!