I was one of those early adopters who got an OQO model 02. This tiny little computer runs Windows XP, Vista, or 7 and has the ability to function like a standard PC. OQO is no longer in business (however, it's possible that a company in China has taken over the development and distribution of the OQO).
OQO closed in 2009.
If they hadn't, they probably would not have lasted very long because the Apple iPad came out in 2010. Most people working in health care have found that the iPad is able to meet most of their computing needs. If not, they can use a remote desktop app (like LogMeIn Ignition) to access their PCs.
I still have an OQO model 02 and I often wonder if it will go into my personal computer museum (along with my Apple Newton MessagePad).