The backgrounder app sucks in my opinion. I couldn't run more than one app at a god damn time anyway because you get the stupid memory low error, in which case backgrounder stops working. The sole reason I jailbroke my phone was to run BeejiveIM in the background with backgrounder. It worked, but as soon as I launched say, the MySpace app, I'd go back to Beejive and it would boot up again and not resume from where I left off.