Too Much Treo? No, Not Really

I just discovered that I have worn a callus on the inside of my pinkie finger because of the way that I hold my Treo when I type one-handed. The conclusion that I draw from this is that I apparently often use the Treo only in one hand. As a result, in the future I should probably avoid any smartphone that requires two hands to type.

(Any suggestion that I use the Treo too much, will fall on deaf ears).