This is implemented by a third party plug-in called “rsync backup for Android” which is now available on the Android Market. https://market.android.com/details?id=eu.kowalczuk.rsync4android

I believe this request is obviated by the latest updates to Google Maps on Android, which allows for automatic checkins.

This setting is restricted by Android, and cannot be modified by 3rd party apps such as Locale. http://developer.android.com/reference/android/provider/Settings.Secure.html

Even if this setting weren’t restricted, I don’t think it would be of much benefit. This setting simply prevents Android from notifying you of open access points. Android will still have to scan periodically, otherwise how would it know to connect to known access points?

While an interesting idea, our studies have found the location data in contact lists is not very useful. Most people don’t even have addresses in their contact list. And for those addresses that are in the contact list, most of the “locations” in your address book aren’t really going to be places you’d want the ringer to be silent (e.g. who puts the movie theater or library in their address book?)

The best use case I could see for this would be a consultant who travels to a number of different clients, and would like his ringer to turn off at each of those client locations. Having done that type of work in the past, I could see such a feature useful. I just don’t think currently there are enough people who would need this sort of functionality.

Is there any important use case that’s been missed?

Update August 4, 2010:

A third party developer has released the free “Locale gtalkcontrol Plug-in” on the Android Market which implements this feature request. This plug-in uses private APIs, so there are no guarantees that this plug-in will continue to work in the future however. https://market.android.com/details?id=com.dattasmoon.gtalkcontrol

Unfortunately, apps like Locale cannot modify the notification settings of Google Talk or any other individual app. Locale can only change the system-wide notification settings (e.g. disable all notifications).

The only ways to accomplish this would be:
1. Google creates a Locale Plug-in for Google Talk. (This would be similar to the K9 Mail Plug-in)
2. Some sort of Locale plug-in to sign you out of Google talk. But I’m not sure if this would be possible or not because I haven’t looked at the Google Talk APIs.

This is already supported.

Locale applies settings once: when entering a situation.

If you want to manually turn on Bluetooth (but your situation has Bluetooth turned off), it won’t turn into a fight. Locale won’t change Bluetooth state again until your situation’s conditions change. So any manual override remains in place until situations enable or disable due to condition changes.