One of my favorite features of RTM is the ability to add tasks via one text input with shortcuts to add labels, due dates and locations. It's a great step over filling out multi-field forms to create tasks.

While the web interface supports this, along with things like the Android client, the Google Gadget does not - it has the multi-field form to add tasks. I'd love to see the single text box feature added as an option to the Gadget as well.