So now I'm in Manila, capitol and largest city of the Philippines.
Manila feels much more like a 'big city' when compared to Saigon, probably because there are many more tall buildings and the infrastructure is more advanced. The class difference, however, is a great deal more stark. Manila is, as some people have said, 10% Singapore and 90% Mumbai, or skyscrapers above shantytowns. A great place to live if you have alot of money...
TransportManila has jeepneys like Cebu, but thankfully it also has an elevated railway (the LRT) and something called an FX, which is basically a more modern jeepney, employing a van instead of an old jeep and costing about twice as much to use depending on distance.
Small World Part I: My first time using the LRT I found myself jammed into the railcar Tokyo-style. Right next to me was the same guy who sat acriss the aisle from me on the flight from Saigon to Manila.
So, what is there to see?
Intramuros 
The old Spanish walled city. Most of it was destroyed by the Americans during World War II but some of it still remains. You can really get a feel that you're stepping back in time into the Spanish colonial era, where people wore European clothes in tropical weather and there was a Catholic church on every street corner:
Makati The first-world part of the city. Shops, restaurants, bars and upscale shopping malls. Where the moneyed class chooses to live and play (if they don't live in subdivisions outside the city).
The Ayala MuseumA very modern museum built by the fabulously wealthy Ayala family. It tries to be all things to all people, encompassing ancient Filipino hstory, modern political history, ancient art, modern art, and some marine biology for good measure.
Rizal Park (aka the Luneta)Practically the only sizable park in the city, it has an oddly disorganized and un-parklike feel to it. Stl, it contains a decent National Gallery (houding Juan Luna's masterwork
Spolarium) as well as a pleasant Chinese Garden and a Chess Plaza where unsuspecting Americans like myself can lose 20 pesos playing against Filipino experts:

Small World Part II: While in the Ayala Museum I ran into a Filipino couple and their Canadian friend. I ran into the same group in the National Gallery AND in the Luneta.
Binondo
Manila's Chinatown. More or less the same as Chinatowns all over the world: narrow streets, Chinese restaurants, herbal medicine stores etc. It also borders Quiapo, which is the chaotic counterfeit-goods haven of the city.
Malls, malls and mallsAs expected, Manila has more shopping malls than you could believe possible in such a crowded city. The biggest is Mall of Asia, which is - I believe - the fourth largest mall in the world.