I found this app in the installer. It is apparently by Giancarlo Erra. I didn't see anyone posting about it so I'm gonna put it here. It will allow you to change the automatic mail checking time to something lower than 15 minutes. For example, you could have it check your mail every minute if you wanted to. The problem is, when I tried using it, it showed the "Please wait and follow on screen instructions" screen, and then it crashed and brought me back to SpringBoard. I tried changing the permissions to 755 but it still didn't work. Any ideas?