1. Allow voice memo and photo capture (voice is more important). Much easier and safer to take a voice memo while driving rather than typing!
2. Allow you to mark done (I know, it's coming, but it's still *my* wishlist! ;) )
3. More sort options and respect color codes. Allow me to sort not just by context, but also by topic or project.
Tips:
1. If your phone is jailbroken (you evil person!) install SBSettings and Backgrounder from Cydia. Set TR to be allowed to run in the background, then move TR to your dock and kick iPod out of there (or whatever you use least). Launch TR and leave it on your capture screen, then exit. It will now have a little badge telling you that it's still running. TR will now come to the front darn near instantaneously when you need it.
2. Swipe your finger horizontally across the status bar at the top, and you'll pull up the SBSettings menu. Tap "More". Choose the extra that shows you how much memory you have available. Tap "Back", then click your home button. This will "Re-spring" your springboard (the "desktop" of the iphone), and when it comes back you should now see your available memory. Swipe across that status bar again, then tap "Processes". You'll see a list of your currently running programs, including TR. If ever you need to free up memory, swipe horizontally across whatever you want to close, then tap "Delete", then "Free Memory".
That's about it for now. :)