I know Corey mad a sticky about Task Killers, but I bet alot of you haven't read it. Just a reminder to read the article below so you guys understand Android Task Management, especially you guys with very laggy phones. A task killer used improperlly will cause all sorts of problems. If u have a laggy phone, and are running a task killer, i'd uninstall it, and see how the phone runs for a day or so. Anywho below is a VERY good read!
http://www.androidcentral.com/how-properly-set-and-use-task-killer-oh-yes-i-went-there
http://www.androidcentral.com/how-properly-set-and-use-task-killer-oh-yes-i-went-there