I registered the domain "inmovi.es" just for fun

http://cars.inmovi.es
http://trucks.inmovi.es
http://bikes.inmovi.es
http://vehicles.inmovi.es
all redirect to imcdb

http://bricks.inmovi.es
http://lego.inmovi.es
for the lego-related site

http://planes.inmovi.es
http://aircraft.inmovi.es
for impdb

if you have other ideas, do not hesitate