That's what I thought also, but their are still apps I use that don't incorporate ios4 backgrounding or use it well like the BofA app as an example. This app finally added backgrounding but every time you go back to the app its on your account selection screen instead of the account itself.I wouldn't think there would be much of a need for it since the release of iOS4
Doesn't seem to work for me on the 4S running 5.0.1. I respring to safe mode every time after I install it. The only real reason I wanted it was so Cydia didn't refresh on me every time I bounced back and forth using dashboard.Yes sir, I use it.
Most of the time on Atomic Web, that way it keeps my pages open when I switch to another app. I also got it setup to close the apps on exit for everything I don't want so they don't linger around and most of the music apps I just let App backgrpup service to handel it.