I’ve managed how to make bluez-gnome-1.8 to work with new obex-data-server-0.4 API. Now GNOME Bluetooth applet on my Gentoo laptop can send files again, instead of throwing the error “Method “CreateBluetoohSession” with signature “ss” on interface “org.openobex.Manager” doesn’t exist”. I even can connect my Nokia N800, for some reason previously it didn’t work.
Nokia Tablet side
Check details, patches and ebuilds in Gentoo bugzilla.