hjb are you flying into LAD too? If so I have a few tips on how to make that as painless as possible.
For departures, the main waiting area isn't too bad: there's a bar and cafe which has so far failed to poison me. The toilets are awful (for an airport) but fairly standard for a 3rd world country.
Re local currency: it is illegal to take local currency out of Angola, so make sure you have none left when you leave.