The gadget lets you create multiple lists, use the toolbar to clear completed tasks or to reorder tasks, sort the tasks by due date and view a list of the completed tasks.
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If you don't want to use iGoogle, the URL of the canvas view is https://mail.google.com/tasks/canvas. Bookmark the page and pretend it's the standalone version of Google Tasks.
Here's the full list of Google Tasks interfaces:
https://mail.google.com/tasks/m - mobile version
https://mail.google.com/tasks/android - Android version
https://mail.google.com/tasks/iphone - iPhone version
https://mail.google.com/tasks/ig - iGoogle gadget
https://mail.google.com/tasks/canvas - iGoogle gadget in canvas view
(replace /tasks/ with /tasks/a/your_domain/ for the Google Apps versions).