First stop, print out a tube map for London. Check out The Real Undreground flash movie on that page-- it shows the tube map that was originally created, the current tube map, and a morphing of the standard tube map into one that is true to the geography of the city.
Next up, a map of the Paris Métro.
And this is cool-- a map of London bloggers, organized around the tube map.
Next, information on the hotel I always stay at.
Finally, I need to print out information on wifi near Leicester Square, as well as Paris and London restaurant recommendations that I got from Tribe.
I love the net!