I've tried to cancel my order (16GB Black) at GeekBuying. This is the answer:
Dear customer,
This is the customer service of geekbuying.
Thanks for your order .
Sorry for this delay that the item 347651 is extremely popular and we need a number of it to meet demands ,it will be available in next week on our warehouse.
Would you mind waiting for some days ?
After testing and packing ,we will send out soon .
You will get the tracking number .
If you have any problem ,we will try our best to help you .
have a nice day
Best regards
Bella
It's strange because I ordered a 16GB Black GPD XD and 347651 item is the 32GB one 
If the mail is correct, 32GB Black will be available next week
Yes, GeekBuying has been giving me a line or two about the 32 gig, as well - although, unlike you, I DID actually pre-order it:
Hello there ,
We are regret to inform you that the delivery date of it was postponed to 10th ,Sept ,.would you mind waiting for a while ?
there are several orders in front of yours have not be shipped yet .
We would appreciate if you can wait it patiently .once it is shipped ,you will receive an email with the tracking number .
if you have any question ,please feel free to contact us .
have a nice day
best regards
Dora
You never know - good things come to those who wait - Maybe it will be a second run with a few kinks worked-out. Maybe the paint coat will be better - heck, maybe you'll actually GET a 32 gig, instead of the 16 gig you ordered!