'Cause it doesn't work right, yet.

I love host mode capability, but I am willing to put up with the stupid error messages that don't mean anything. When I plug in my keyboard, why do I get an error message about file systems not being compatible? I don't know..and I don't care. Maemo has often been released with both supported/advertised features and built-in features that don't work quite right yet.

Plus, the developers at Nokia learn from all the stuff Maemo users/developers come up with.

I imagine that host mode and proper switching between devices will be builtin and advertised when it works correctly. Next release? At the present, I'm just glad it's here, error messages and all.