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Another vote here for suitable auto modules. Besides the usual array of community modules that are important like forums, news, calendar, and photos, useful modules for us are a good classifieds system, user (driver) profiles, racing stats, and auto maintenance modules.
The plethora of games oriented modules and themes just don't do us any good (no offence). I'm willing to help but I'm not much of a coder. At least a start from scratch coder I'm not.
A maintenance module would be hugely popular on my site I would think. Of course it is a user centric (secure) module vs an info only (bling) module.
My club does grassroots racing so a racing stats module would be really nice. There is a soccer oriented module I'm keeping an eye on that looks promising.