The title says it all i think , i have searched high and low and cannot find a Samsung Omnia SDK.
I know its possible to use the .net framework for development , but i want more , specifically being able to access the motion sensor and maybe the GPS as well.
Any idea or directions are welcome.
You should be able to access the GPS with the GPS intermediate driver. Have a look at the GPS sample from Windows Mobile SDK.
I don't know where to find the Omnia SDK, but if you can't find something in xda-developers, it would be very hard to locate it.
EDIT: Little bit of search and here is a forum post linking to an SDK for the GSensor.
Here you can find SDK and Emulators for Samsung's Omnia, the second link should lead you to SDK for Samsung's specific API like accelerometer.
GPS should be accessible thru common API GPS Intermediate Driver Reference to access it from .NET simple use pinvoke