Finding Upper-case characters in regexps, unicode friendly.

[possibilitybox at gmail.com]

I'm trying to make a unicode friendly regexp to grab sentences
reasonably reliably for as many unicode languages as possible, focusing
on european languages first, hence it'd be useful to be able to refer
to any uppercase unicode character instead of just the typical [A-Z],
which doesn't include, for example É.   Is there a way to do this, or
do I have to stick with using the isupper method of the string class?