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LG
Ability to send emails as tasks via Apple Mail
KH
Pop up notifications
Dark/Black theme for Android App/Widget
AR
Windows Phone 7 - Native App
Linux App
PL
Do it Tomorrow Button
TD
Twistie to expand/collapse indented tasks in all views
Attach files
JM
Negative filters for labels, strings, projects(?)
P
Hide a task till a certain date
HW
Chrome Desktop Notification / Pop-Up Reminder
Location based reminders
J
sort options ( by date/priority ) on all views/filters
IR
Default relative time for reminder notifications should be configurable (Android app)
DT
Integrate with Siri
DM
Support for URL schemes
JL
Dismissing tasks
LT
Set task to stop recurring when specified date is reached.
NM
option to sort task by deadline, name, priority
show Karma in iPhone (and iPad) app