To reveal the Bells and Whistles section, you need to continuously swipe upwards on the ‘About’ button on the Settings page for the app. This should show you Bells and Whistles as an extra menu item. From that menu you can:
- Change the theme color of the app
- Change the default sound (to a monkey or a chicken)
- Choose a waveform to appear when you speak
- Set whether to have links open within the app
Not a huge new range of settings, but better than a kick in the teeth, and sounds like the Google Mobile team had a lot of fun adding these.

I prefer the bright green theme color with the chicken sounds.
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