CityBird has a few MD-11's (one of them comes from World Airways, I think) and 2 B767-300ER's in its fleet. They are based in Brussels. The airline was born about two years ago, the founder is Victor Hasson (I know him !) who previsously was running EBA (Euro Belgian Airlines). He founded CityBird just when EBA was bought by Virgin. EBA is now Virgin Express.
CityBird flies out of Brussels to the following cities:
They used to fly to New York (EWR) but now they don't anymore. Sabena took over that flight. Sabena has now a daily MD-11 flight from Brussels to Newark.
I have a few friends who flew CityBird, they told me that the service on board was OK.