The .NET Compact Framework 2.0 SP2 has been released for mobile devices as a download on MSDN - The March 2007 Windows CE update also includes the .NET Compact Framework 2.0 SP2 bits for the Platform Builder Catalog.

Here's a link to the downloads.

Windows CE 4.2

Update name: Windows CE 4.2 Platform Builder Monthly Update (March 2007)

Windows CE 5.0

Update name: Windows CE 5.0 Platform Builder Monthly Update (March 2007)

Windows CE 6.0

Update name: Windows Embedded CE 6.0 Monthly Update (March 2007)

- Mike