Android 2.x doesn't support multitouch natively in the WebView so we can't use pinch-zoom on the map. We have an experimental plugin in the Wiki Loves Monuments app that can detect basic pinch-zoom events and send events into JavaScript for us to pick up; it's not pretty but it works. :)
Once we've merged the Cordova 1.7 update, we can go ahead and copy this in.
Version: 3.2 (iOS) / 1.2 (Android)
Severity: normal