First post.
Browse appstore for the top downloaded apps. My personal favourites are Doodle Jump, Facebook, Touchgrind, Quota, Angry Birds and WSP Texas Holdem. Theres plenty of good stuff on there.
For the weather thing, you have to touch the little 'i' in the bottom right and then press the + at the top left to add another location.
iPods touch and iPhones are pretty cool.