Hola desde Buenos Aires! Well, I've arrived! I'm safe, I'm sound, I'm in one piece and I'm loving it so far! My host family are absolutely wonderful and I could not feel any more welcome. The city, from what I've seen of it so far, is at times beautiful, teasingly curious and rather edgy. My new-found American friend Dan, who is staying with the same host family, and I had a narrow escape yesterday evening, involving a narrow staircase from a busy avenue, a ridi...