Going to try and post something new every few days if I can... lately I've been discovering all sorts of things. Here's a couple to get us started. Feel free to share your own tips/findings.
1.) iPAD's have a built in microphone, so you can actually use an App like Skype to make phone calls via Wifi. Sound quality is surprisingly good and crisp.
2.) Ever want to capture what's on your iPAD screen? Hit the home and lock button simultaneously to take a screen capture of the screen at the time.
3.) Using an App like 'Team Viewer' you can actually remote into your PC or Mac - from anywhere you have Wifi.
4.) Using Apple's 'Remote' App you can control iTunes and/or Apple TV remotely turning your iPAD into a large remote.
5.) Two great free Adobe (of all things) Apps: 'Adobe Ideas' - good for notes and drawing (including on screen captures noted above), and 'Adobe Photoshop Express" - great for simple photo editing.