Scoble blogs about using his tablet PC while waiting in line for planes and security.
I can so relate to that... I flew Air Canada from Honolulu to Vancouver last month and had to wait about 1.5 hours in their line.
I had my ruggedised tablet (a Panasonic Toughbook) with me just slung over my shoulder on a shoulder strap so I could just swing it up and surf/blog, then let it dangle again when the line started moving.... I'm sure everyone thought I was wierd... but then they were all freaks and geeks as well- they ran out of seatbelt extensions on the plane! Thank god I wasn't sitting in one of those rows... broad shouldered guy like me has precious enough room in coach as it is!