Über is finished ... has been for a while.
Just a fad that won't catch on globally as it attempts to circumvent various healthy/safety/taxation measures.
The sad part about it is that it will lead to cracking down of BBS-based ridesharing programmes
like this:
Carpooling & Ridesharing across Europe | Ridefinder.eu
the crackdown will be driven by insurance companies if there was evidence of financial exchange.