Recently while on vacation I was looking for a simple way to take pictures on my iPhone and upload them to one of the major photo sharing services, without much hassle. The official Flickr app does that. It makes it simple to upload pictures from my camera roll directly from my iPhone to Flickr.
One quick way to find a window on a crowded screen is to use the Dock. You can click and hold on a running application in the dock and the menu that appears will include a list of all window titles. So, for instance, if you have several Finder windows open you can click and holder the Finder icon in the Dock to see a list of Finder windows. Select one and it comes to the front.
1984: You can now run programs in windows instead of taking up the whole screen.
2011: New feature! You can now run programs that fill the whole screen!