[Vlip3]

I saw a video on youtube called why the iphone cannot match an HTC HD2 (something like that). In the video, the guy pressed something (I think it was a hardware key but could not see as it was off-screen) and the display showed icons for all running apps. You could then tap one to switch to it or tap & hold to kill it. This looks like a much easier/nicer way to switch between apps that what I must now do.
Does anyone know what this is and how I can get it on my TP2? I'm running MR 06/20/10 & CHT 1.8.

Thanks,
Vlip3