The new version is a little more polished, including a help file the first time you start it up or from the menu button.
Note the issue that you will lose you token value when you upgrade and will need to reconnect to Google unless you copy it from the Settings first. This was an oversight of the first version that won't happen again.
Nokia's statistics tell me that over 100 people have downloaded GAuth in the first week. Thanks everyone. The eye-opener here is the worldliness of it, even though it's only in English.