Here are some Useful Links to help organise your trip and make the most of your stay:
Funded by the local government this site yout some basic information about Cartagena
Domestic & International Airlines
There are a handful of airlines that serve Cartagena on international and national routes.
All the local news from El Universal and national news from El Tiempo and El Espectador
Pro-Export - The Colombian Tourist Board
The Colombian Tourism Board does a good job of keeping people up-to-date on what's going on in the rest of Colombia and Cartagena.