Hi BrownSource and welcome to 4WM
I am pleased you find the site useful, in answer to your questions:-
1. Automatic settings should use your default settings.
2. Yes you need to update daily to get the next days weather.
3. It will use around 80k of data to update the weather, so used daily you would be better sticking to activesync or it will run up an expensive data bill if you have no allowance.
I hope that helps.

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O2 Ignito (HTC Diamond), E-TEN Glofiish V900, O2 Orbit 2 (Polaris), HTC Trinity, Vodafone v1615 (Kaiser), HTC Tytn (Hermes) + Others!
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