I did a quick web check and you could say, in a rather lame way, that
the world in-line speed record is 280 kpm. I say "lame" because the
skater reached this speed by hanging onto the back of a motorcycle.
See:
http://www.skatelog.com/countries/de...ine-record.htm
The "pavement monster", as Chris mentions, would have a very large
appetite at this speed !!