it would be nice having some more things helpers like moving up and down arrows, home / end button and most of all select/copy/paste button. The sel/copy/paste sequence done by touch controls is really awfull and time waste… TextWriter app has something like that and it seems very usefull to me.
Though the up/down arrows and copy/paste are implemented in a somewhat arcane way and could possible improved, the home/end key functions are missed terribly IMHO.
Version 1.4 has much improved keyboard selection features. Though Apple is still reviewing it.