Recently I downloaded
DSLR Controller and installed it on my Galaxy S2.
I tried it out on my 40d but works nearly as good as the EOS Utility from Canon for OSX or Windows.
Nearly, as downloading images to the Android device is not supported yet but that is not a big deal.
It is now possible focusing on the (red foil wrapped) Android screen (with 10x) rather than a laptop, much more convenient. And presetting the exposure time for B(ulb).
It is still in beta but is usable.
Does somebody have experience with this ?