Dwolla and CampBX are discussing a solution to the problem and everything seems to be going fine. MtGox is ok with this (I haven't heard anything from them). Why is TradeHill the only one being ignored? This doesn't make much sense to me...
That seemed very odd to me as well.
As I hypothesized on another thread, perhaps there are NSL's involved.
http://en.wikipedia.org/wiki/National_Security_LetterMt Gox confirmed some transactions have gone missing on IRC and possibly a post. exchangebitcoin.com confirmed it and isn't accepting Dwolla, Bitcoin7 isn't accepting Dwolla and I've been told they confirmed the chargebacks.
It's 100% possible that CampBX didn't receive any chargebacks. If I have to guess it's because they didn't have the open orders to justify defrauding 5k or they thought they would get caught faster with lower volume to hide in. If that's the case good for them. Dealing with fraud isn't fun. I'm assuming if they continue to accept Dwolla and nothing changes they will see fraud.
Jered