The Windows Embedded CE 6.0 Monthly Update (January 2008) includes support for the .NET Compact Framework 3.5 component for the CE 6.0 catalog (see image below [blatantly stolen from FrankPr's blog]) - note the Jan 2008 monthly update for CE 5.0 also contains the .NET Compact Framework 3.5 component.

netcf35pb60

- Mike