Something that annoys me is when people listen to their iPod or their personal music player at a really high volume. Sure, they have their headphones on but do they not realize that they are playing their music so loudly that everyone around them can hear? Regardless, not everyone is interested in sitting next to you in the library or on the bus while you blast your horrible, insipid music with a fuckin annoying and repetitive beat.
On another note, I am using the new iMac in the greenhouse at work. The keyboards feel different and the mighty mouse is oh so expensive and rolly.