In Europe they are using for a couple of years analog oil level gauge. Renault, Peugeot-Citroen, Volkswagen, BMW and Mercedes are using these sensors for all their cars. Fiat and Alfa Romeo is also using this on some vehicles. The level indicator is done either by a "oil ok" or a bargraph.
These sensors are provided by Valeo (http://www.valeo.com
The problem due to the crankshaft is solved by make the oil level measurement just before the engine in on, just at the key on - and it's enough.