Just for your information if you have tried the .NET MF 3.0 beta 2  with Visual Studio 2008 and installed SP1 beta: when trying to compile a console or window application (library projects are ok) you’ll get an error message after compiling:
C:\...\Microsoft.Common.targets(2341, 9): error MSB3185: EntryPoint not specified for manifest. Done building project "MFConsoleApplication1.csproj" -- FAILED.
The Microsoft.Common.targets EntryPoint looks like this: EntryPoint="@(_DeploymentResolvedManifestEntryPoint)"
The .NET MF team is not testing against VS 2008 SP1 beta and this issue  will be resolved before release, of course. Well, I'm using a Virtual PC, now, as I have already SP1 installed.