After getting my Samsung Galaxy Mega phablet as a replacement for my Tab 7.7, things have in general been excellent except for typing when in portrait mode. The smaller screen real estate for the keyboard makes one more prone to pressing on the wrong key when touch typing. How I miss the hardware keyboard of the Palm Pre 3!
Anyway I am a little late in to the Android game but having taken the Swype plunge I can say it is an excellent way to rapidly enter text. Apart from speed, the text prediction is awesome. I rate it 10/10 and well worth the $0.99 in the Play Store (trial version available)!
This demo shows the power of Swype
It’s a pity Swype is available for Android but not iOS. However, if you have a Jailbroken device, you can try a beta app called iSwipe. Instructions here