>Which reminds me that in no country the SI unit for temperature (Kelvin) is in common use! This one seems to be reserved for scientific applications.

Yeah, that one's got a long way to go catching on...

>And then, of course, we have the continuos confusion of people saying that something "weighs" so-and-so many kilograms.

I figure that's okay as long as people understand the difference (but mostly, they probablly don't understand, unfortunately). There isn't any good, widely understood verb-form of mass, is there? That may be part of the problem with this...you can say "measure" referring to taking a mass measurement, of course, but it's not very specific of a term.

"Mass" has too many meanings, also, to make it a useful verb? ("To mass"?)