If you collect customer information in any way, then you need to have at least read this
Privacy fact sheet 17: Australian Privacy Principles
They require you have to have a documented privacy policy and a complaint avenue for a breach of the APP, etc.
To use google adwords you have to have some of these things anyway.
Remember they are to reduce spam, which we all hate with a passion of a thousand fires. Hopefully a few templates will emerge in the next few days and we’ll all copy them (without breaching copyright of course)!