Based on a question raised at the last meeting I did a quick revisit to see what's out there in the Ultra Mobile PC realm of things.
Note, UMPC is a term Microsoft coined so the devices are invariably windows if it has that label, devices running other OSes would likely be called something like Internet Tablets.
Here's a list of some general options ranging from $750 - $2000, of non ruggedized devices. My biggest concern with these devices is battery life, keyboard controls and screen brightness outdoors. But if someone has funds there are a few that look worth trying.
http://www.bhphotovideo.com/bnh/controller/home?O=sort&A=search&Q=&sortDrop=Price%3A+Low+to+High&bl=&atl=&pn=1&st=categoryNavigation&mnp=0.0&mxp=0.0&sv=13172&shs=&ac=&fi=all&pn=1&ci=13172&cmpsrch=&cltp=&clsgr=Alex