Thoughts

I am the owner of a chain of automotive forums run under the title FMVperformance Automotive Communities, and owned by TrapZero, LLC, of which I am the principal owner.

Ford:
FordFusionClub: This site supports the Ford Fusion, Lincoln Zephyr/MKZ, and Mercury Milan. These are all varients of the CD338 platform, of which the Mazda6 was the first.

Mazda:

Mazda3Forums: The king of the FMVperformance sites, M3F supports, obviously enough, the Mazda3, a Mazda varient of Fords C1 platform.
MazdaSpeeders: This is a general purpose Mazda site.
CX7club.com: Our newest site, based on the Mazda CX-7 crossover vehicle.

Volvo:

SmallVolvos: This site supports the Volvo C1 based vehicles, including the S40, V50, C30 and C70.