Currently, Twitter supports gettings tasks due on a particular day (!getdue), or by list (!getlist), tag (!gettag), or location (!getlocation). Why not add the option to search for tasks via Twitter instead of being constrained to the above?

Example (via SMS via Twitter):
d rtm !search due:today AND (location:mall OR location:publix)
...and RTM direct messages you with all your tasks for today at the mall or at Publix.

The majority of my RTM task management is through SMS (via Twitter), so it'd be really nice to have more flexible task retrieval.