IMExchange 2

In the Tasks list, tap the Sort button (up/down arrows), then tap Sort by Last Modified (it may take a few seconds before it lets you tap that button). Next, tap the Filter icon (question mark at bottom) and make sure Showw All Categories is checked. This is your Recent Tasks list.

Pocket Informant for iPhone/iPad/iTouch

PocketInformant for iPhone/iPad does not support a Recent Tasks list.