Anniesantiago, can you tell me where exactly to catch the bus to Pamplona from the airport? I arrived at 6am in the morning, so all the information booths were closed, and I wandered around for ages trying to find either the bus, or someone who could tell me where to catch it. I found my way to Terminal Four, and in the end asked a couple of bus drivers, who spoke very little English (and I spoke an equivalent amount of Spanish). They kept saying something that sounded like "Ameriga" and waved me on to their bus, which then headed into Madrid (to my horror, as I was carrying a lot of cash, and was worried about pickpockets). All was well, however, as I was dropped off at the bus terminal in Avenue de America, where I managed to buy a ticket to Pamplona.
I'm still dead curious to know where I could have caught the one from at the airport though.