An interesting feature that is on the iOS 5 is that it allows you to creat shortcuts when texting. This is not one of the advertised features and is rather hidden but I thought this could be pretty useful. This is particularly useful for anyone who texts all the time or always has to send emails and it can save a lot of time for them.
All you need to do it go to settings on your iOS 5 device, then keyboard and you will find a section that you can add little shortcuts. CultofMac have made a little videoa that demonstrates this and shows how exactly it could be used. You can see the video below.
Hope you can benefit from this hidden little feature.