The Goozex customer service is pretty good, it's helped me out several time already. When you have questions, you'll probably get more answers from the Goozex forums, where there are loads of helpful posters, and uber-Mods (not counting me, I'm a Newbie Mod).
If a game for some reason is sent to Goozex, you can rest assured that you will receive the points for your game. If it's a mistake on the buyer's part (ie, incorrect address), you can't be held responsible.
As for how to ship games, I wouldn't suggest using the printable Goozex mailer, as it is flimsy, and games have been know to be damaged in them. Instead, you should use a bubbler mailer, and use delivery confirmation so in the UNLIKELY case (I have sent out more than 60 games, as you can see in my sig, and no one has ever tried this with me),that someone tries to cheat you out of points by saying they never received the game, you have proof otherwise.
Anyway, you should be patient with getting positive feedback, as shipping can take a bit, especially with the long weekend. Also, many users like to test out their games before leaving positive feedback, to make sure they work. The buyer has up to 21 days to leave feedback, so there's still plenty of time. Also, you only have to wait for feedback to get your points for your first couple of trades. Once you get a feedback score of 20 (which takes about 2-3 trades), you get your points right when you accept the trade.
If you need any more Goozex help, you should swing by the forums, there's a link on the main page. I'm there all the time, so I'll be able to help you out. I just found this thread by accident, heh.
