Ron Hardin wrote:
Is there a site with a world-wide jet stream map?

There is http://weather.uwyo.edu/upperair/uamap.html,
which has maps covering the Northern and Southern Hemisphere,
and more detailed maps for smaller regions.
For the jetstream you would look especially at 300 or 250 mb
level. For better readability, you may want to uncheck the
"Observations" checkbox, just keeping the "Analysis".

Falk