How many times a day do you do app killer. It seems like everytime I do it it kills my apps but pops right back up with another huge list. I don't think I go crazy with it but I do it quite a bit.
In general you don't need to use the app killer to close running application, for two reasons - 1) The underlying OS manages the memory so that it only gets used by apps that are really using it, and 2) the phone does much of it's magic by having things running in the background.
I have been wondering the exact same thing. I will kill all open task....then immediately go right back into my task killer and my calendar will be open, alarm clock, all kinds of apps, etc... and I hadn't opened a single thing. I am getting very very frustrated with this damn phone and close to going back to my BB Tour