Multiple sub domains, 1 MU installation

Can MU be configured where users have are given a choice of different subdomains for their blog? Attached is a graphic illustrating the format. User goes to http://www.TopLevel.Dom and can pick which subdomain they would want their blog to reside on.

For example, say we're talking about a car blogs and the TLD is myCar.com. Preset subdomains might be, ford.myCar.com, toyota.myCar.com, jaguar.myCar.com, etc..
Users would go to myCar.com and have the ability to choose which subdomain they want their blog on. A few examples might be:
JaneDoe.ford.myCar.com, JohnnyGuitar.jaguar.myCar.com, fj55.toyota.myCar.com, etc...

Hope this is a simple YES! or NO! question.

Thanks in advance!