Windows Identity Foundation support for Windows Server 2003 SP2 is coming in December 2009. This package will be in English (en-US) and six other languages: German (de-DE), Spanish (es-ES), French (fr-FR), Italian (it-IT), Dutch (nl-NL), and Japanese (ja-JP). Stay tuned for further updates!
You can download the WIF packages for these operating systems here:
· Windows 7
· Windows Server 2008 R2
· Windows Server 2008 SP2
· Windows Vista SP2