Undo & cancel, PRETTY PLEASE WITH SUGAR ON TOP! Ideally there should be undo for the past several edits.
I'm thinking about going back to Windows Mobile... Even my Palm V had this in 1999 (and graffiti)! I also miss having a stylus.
There should be a disclaimer on the box of Android phones:
WARNING: MAY BE HARMFUL TO YOUR (MENTAL) HEALTH -- NO UNDO OR CANCEL!!!
I wouldn't have bought this Nexus S had I known about this (also no FM, but that's another issue).
Soooo much pain & frustration, lost time (& hair), multiplied by the Android user base worldwide; millions of man hours. Immeasurable stress response, anguish. Psychological damage, psychotic episodes... Grab the wheel, I'm swerving out of controoooool!!!
SUGGESTION for you Android users:
1. I highly recommend the SlideIT keyboard (Swype wasn't available on my Nexus S). I use SlideIT 95% of the time when writing text; it's super fast (watch tutorial video first! Install it from the Marketplace. Hit the ?123 key at bottom left; Settings; scroll down to find video). Well worth the $5 or so (but you can use it free as a trial first).
2. Install the TouchPal keyboard. It has 3 keyboard screens (including T9); just slide keyboard left or right to change. There's also a screen with arrow keys for moving up, down, left, and right!!! A real Del key (not just backspace)! Home, End, Page Up, Page Down, Copy, Cut, Paste... Access the special keyboard with the key at top of the keyboard in the middle (it looks like a notepad with pen) . Note: I couldn't get Select to work, but that's okay as I can do that with my thumb (most of the time!).
NOTE: Another plus for TouchPal is great Chinese input.