No need to add the networks manually, when the service close the previous wifi network state is restore.
widget + app
I know there is some issues with ANR (Activity Not Response), working on the issue, if it happened to you please send me an email (email@example.com), with the device model and Android version, it will be a great help, thanks.
If you use this app and want to support, please buy the donate version.
The widget tested on Nexus one(2.2.2), Htc wildfire (2.2) and Samsung Galaxy S(2.2).