@Bensheim: see if this Terminal command produces any useful output:
grep $LOGNAME ~/Library/Cookies/Cookies.plist
DEAR FOLKS:
Actually, that command is only gonna work if your e-mail and your shortname are the
same. [which i have done for uniformity's sake since day one.]
So here's the deal if your situation is different...
as an example, let's say your e-mail address is:
groucho@marx.com
In that case (if your shortname isn't also groucho... then), the proper Terminal command would be:
grep -i groucho ~/Library/Cookies/Cookies.plist