Wow this swipe gesture, this remindes me of how my WebOS driven Pre+ handels multitasking in a much better way for years now.
I am waiting for the HP Pre3 it has much better multitasking and it's an open Platform. HP supports the Homebrew community.
To have an WebOS device it's a bit like MorphOS/AmigaOS in your pocket.
My last Nokia Phone was the 6210i, after that i switched to SonyEricsson. SE build better Phones then Nokia ever did but like Nokia the get lazy two years ago i switched to Palm WebOS, with real multitasking.