Is there an app / SBSetting that will allow fast switching between wireless networks?

When I am at work, I frequently switch between my work's wireless network and my tethered MyWi connection depending on what I'm doing with my iPad.

If I'm checking Facebook, Twitter, or accessing the iTunes or App store, I have to use the MyWi connection as these sites are blocked thru my works network. If I am updating my RSS feeds, checking non-blocked sites, etc, I prefer to use my work's wireless connection which is of course much faster then the tethered MyWi.

Is there an app or an SBSetting that will allow me to quickly switch between these connections? As opposed to having to tap settings, tap wi-fi, wait for it to load, then tap the new connection, then press home to exit out?