I am new to the whole iPhone thing. I picked up my 3G about 3 days ago and am following all the guides out there, especially the battery guide. My question is do applications fully close when you hit the home screen button? I think they do, but when I go back to the application it picks up right where it left off which makes me think they never closed in the first place. Now if they closed when I hit the home screen, and pick right back up where it left off when I go back into it due to memory or something...then thats a win/win. The iPod doesnt close right? Thanks for the help. If someone could forward me a link that has the general use or how an iPhone works that would be greatly appreciated.