Translation of arroba

Let in rain again. I love listen to music on the weekend while it rains. When I used to live in Darmstadt I hated the rain, but since I live in Greece, I love it because it does not rain that often here.
It is called Facebook viral marketing. I'm 62 and it's somewhat mystifying, but my two boys are using it continuously. What I'm a bit afraid of is the personal information they send to everybody. It has no privacy.
Have you ever visited the U.S. before and if so, where have you been in the U.S.? I've been travelling in California, it was very amazing. We have traveled by car. Here are my corrections.