I would love to see..

[dwn2ridehtchck1]

a seventies themed nieghborhood or one of the fifties. That would definitely give my town a old feel to it but I have no idea how to make this happen.

[aaries16]

It'd be a good suggestion for the monthly themes here. Then you can download other's creations - you can do that now actually, just search for it.

[AlexandraSpears]

If you look over at Parsimonious, Kate has themed clothing/objects.

http://www.parsimonious.org/

And of course Google is your friend. :)