BrammoFan (a.k.a. Harry) with his eagle-eyed vision for all-things-brammo noticed a motorcycle dealership in San Francisco that's now renting Enertia's by the half- or full-day.
Rates: $69 for 1/2 day, $99 for full day
They can rent you a helmet, jacket, etc. The rental includes things like 24 hr emergency service.