I moved my admittedly small amount of bitcoin to yobit before their market opened for it and as soon as it opened I was given the same amount in bitcoin gold as I had in BTC. I am not some fanboy of yobit, I had just enough to think it was worth doing and just enough to risk if it all went wrong. Glad to say I did this, within 5 minutes of the BTG market opening it spiked to $970 a coin - I cashed out my small amount at a market price of $750 - not bad for doing nothing.
I am still on POLO most of the time and still hate them for all the reasons everyone else does, but I do like the interface.
Oh and as for the $1 trade thingie said above by dreamer81, then at the time of writing this, BTG is being traded on Yobit for over $300 a coin!
Just an FYI