According to 37signals Updates Backpack for the Better at Web Worker's Daily, the new Backpack gives web workers "good reasons to give the online organizer another look."
The new Backpack now lets you dump text, images, links into a single “Collection” page when you’re in a hurry, and then relocate them item by item to organized pages when and how you prefer...It’s the primary reason I have now come back to the service.
The review also mentions Backpack's new search, OpenID Support, and 3rd party tools like PackRat that can customize the Backpack experience.
Search all your Backpack pages easily.
