[wlesieutre]

I do it for integration with Google Voice (with Phone GV and SMS GV) so that I can place calls from the built in dialer and send free texts through Messages.

The other thing I use frequently is NCSettings, which is much like SBSettings, but well integrated into notification center. It has a couple of pages you can swipe through, and gives immediate access to toggles for wifi, data, volume, brightness, VPN, location services, and more. http://modmyi.com/info/ncsettings.php

I also use Chrome on my phone, mostly because I use it on my desktop and laptop and like to have access to open tabs from my computers. It's doable without jailbreaking, but being able to set it as the default browser makes it a lot better.