"Have any wing chun boxers ever competed in MMA? "
According to the site, yes. Alot of fighters mentioned winning on the ground, but their standup game was totally wing chun. These guys are dedicated to bringing wc back to the reputation it really deserves, not the one that like say the Bullshido people have given it.
The problem with WC in MMA competition is the submission side of it. This is why WC full contact comps with takedowns makes sense to me. They are talking about rules for such an event on WC fightclub now it seems - and it was brought up that allowing takedowns but not submissions might encourage fighters to use their WC to get back on their feet. Yes, these are rules and restrictions - but seriously show me a fight org that doesn't impose rules these days. This is exciting stuff for kung fu folks, i would think. De-politicization, harder training and proven ring effectiveness.
I'm not in for comp fighting myself (well, I might do it just to say I did it

), but I am sick as hell of the excuses folks come up with (ie: ooooh, it's TOO DEADLY for sport fighting

)
The way I see it, sport is a representive link to the overall consciousness of the public. Most people, even martial artists, relate more to sport than combat because it's more accessible and let's face it - much more palatable.
I don't really care about winning or losing, but I love WC and kung fu in general and want it to be respected.
Uh, sorry for the rant. This stuff has been banging around in my head too much lately