• Passport
• Tickets, tour vouchers, limo and luggage-transfer coupons
• Cash and traveler's checks in appropriate quantities
• Comfortable walking shoes that are easy to slip on and off
• Camera (20/2.8, 50/1.4, zoom, charger, mini-tripod, media, USB cable, GPS geotagger)
• Laptop (also charger, ethernet cable)
• Rented cellphone, in case the company gets really desperate
• One set of nice clothes (well, better than my usual standard)
• Enough clean clothes to get through several days, not so many that I can't fill the rest of the suitcase with souvenirs on the way home
• Headphones, earplugs
• Coat suitable for sightseeing at ~8,000 feet above sea level on the slopes of a dormant volcano
• Sony Reader filled with Wikitravel dumps, subway and bus maps, and a whole bunch of stuff located through extensive use of Google Earth Plus
• Sunglasses
• Daypack
• Compact umbrella
• Sundries
• Partner in crime
• Eleven days

Soon. Soon.