BMW corporate purchase program through Perks @ Work now offers $11k for the purchase/lease of the new i3. The standard is $500/$600 discounts, but for the i3 currently its $11k (up from $10k last month).
The program is limited to new BMW customers (i.e. if you have bought a BMW in the past 24 months you may not qualify for discount), but good sales managers will work with BMW corporate to get you the same discount. (or just register the car to your spouse/partner).