The E-3 is based on the Four Thirds lens standard, so you have the option of mounting lenses made by Kodak and other manufacturers. Olympus has launched a number of other lenses with the E-3, including a wide angle (24mm-120mm equivalent) lens with Supersonic Wave Drive autofocusing.
The E-3 incorporates a Supersonic Wave Filter dust-reduction system, which vibrates dust off the sensor and should take care of pesky motes that sidle in when the lens is being changed.
