I've considered the OQO in the past, it has pretty much exactly the feature-set I'd like, but the main problem I have with it is that it's really too large to fit in a pocket (well at least my pockets, it's rather thick...),
Other than that though the feature-set is king for the size of device, too bad it also comes with a king-sized price, $1,600 to $2,500 depending on options, at least where I've seen it. Too much for CyberCat I'm afraid...