I must say, Kii is now beating the thumbs off of everyone else. They responded quickly to user feedback and now allow flexible side padding of the keyboard so that I can get the whole keyboard to sit comfortably within the reach of one thumb. I'm now swipe-typing one-handed. Who'd have thought we'd ever be able to do that?
Kyocera K612 => Nokia 5320 => Motorola Milestone => iPhone 3GS => Samsung Galaxy S II, Galaxy Note, Galaxy Tab 7.7, and ASUS Transformer => Galaxy S III and Galaxy Note 2 => Galaxy S IV