We were considering an article on this topic, but our own Lex Friedman had already worked through the possible options for an old iPad in an article for Macworld. So if you’re pondering what to do after upgrading to an iPad 2, check out his advice. follow link
Type Faster on an iPhone or iPod touch
When typing on an iPhone or iPod touch, to end a sentence quickly and get ready to start the next one, double tap the Space bar. You'll insert a period followed by a space. You can turn this shortcut on or off via the Shortcut slider in Settings > General > Keyboard.
- ExtraBITS for 14 March 2011 (14 Mar 11)
What to Do with Your Old iPad
Luckily, there's no need to deactivate an old device or anything like that; apps are tied to an iTunes account, not to individual devices. (iTunes accounts are tied to Macs, though, so if you ever get rid of a Mac, it's easiest to choose Store > Deauthorize This Computer before you reformat the hard drive.)