HP's Palm team today provided its first official glimpse at webOS 2.0, the next major revision of its OS. The core interface change revolves around Stacks; borrowing a small cue from Mac OS X Leopard's similarly named feature, it groups app 'cards' based on tasks to simplify switching. Apps that have been opened for related functions will now stay together; a browser used to open a link in e-mail will appear as part of the same Stack as the mail client, for example.
