Longhorn Server 32 and 64 bit version
The transition to x64 announcement at the IT Forum may have some of you surprised. According to Paul Thurrott,
For Longhorn Server, due in early 2007, Microsoft will ship both 32-bit and 64-bit versions of most product editions. But Longhorn Small Business Server (SBS) will be x64 only, as will the upcoming medium business server product, codenamed Centro. Finally, the R2 version of Longhorn Server, due in 2009, will be x64 only as well.
WinInfo