1. There are no save buttons / icons for iwork on iPad. They are automatically saved every 30 seconds.
2. If you are starting a new iWork document (pages / numbers or keynote), and click on the autonamed document below (blank documents always have a name “Blank 1″ or ‘Blank 2” etc.). You will be presented with the edit option to save your document with a different name.
3. I found a nice cool feature while connecting the iPad to LCD TV. While rehearsing for a presentation that I have to deliver at the office, I noticed that when you hit the play button, you are presented with a message which also tells you to “Touch and hold for laser pointer” and then you see a laser pointed simulated on you screen if you keep your finger pressed on the screen for couple of seconds. cool feature. No problem next time you leave your pointer at home 🙂