Microsoft has revealed pricing for additional variants on Windows 7, particularly a Home Premium Family Pack which allows you to upgrade 3 personal computers to Windows 7 Home Premium. The Windows 7 Home Premium Family Pack is priced at $149.99.

As for those who might want to migrate from one version of Windows 7 to another, Microsoft also has a plan for that and they call it the Anytime Upgrade.

You can upgrade from Starter (the version which will be pre-installed in most netbooks once Windows 7 is out) to Home Premium for $79.99, or upgrade from Home Premium to Professional for $89.99 and lastly, upgrade from Home Premium to Ultimate for $139.99.

A customer may purchase a netbook thinking they would use primarily it for email. Over time, they find they are using that netbook as their primary every-day PC. That person decides they want their netbook to do more. If the netbook is running Windows 7 Starter (or Windows 7 Home Basic in select markets), WAU makes it super easy to upgrade to Windows 7 Home Premium. Moving to Windows 7 Home Premium will allow that customer to take advantage of features such as Aero Peek and other enhanced functionality in the Windows Taskbar in Windows 7 such as Taskbar Previews. Desktop themes are also enabled and so is Remote Media Streaming.

Another case where WAU may come in handy is when a person wants the ability to connect to a business network (a “domain”). Using WAU to move up to Windows 7 Professional enables the customer to take advantage of the ability to join a domain and use Windows XP Mode to run older programs. When using WAU to move to Windows 7 Ultimate, you’ll get everything from the other editions plus BitLocker to keep your USB devices encrypted and secure and the ability to run your PC in any of 35 different languages (via Language Packs).

[via The Windows Team Blog]