You should have received instructions for uploading your code samples to:
Note, this is a necessity, otherwise Google expects you to return the
payment! (and you won't get the funky t-shirt either)
The guide for going about this is here:
Note that the soft dead-line is 14 September 2009. It's best to get
your code sample in by then so that you're tshirt goes out in the
first shipment (plus, it means it's out of the way so you don't have
to worry about GSoC related stuff anymore).
Thanks for all your hard work,
P.S. Note that I'm going to be away for the next 2 weeks, so if you
need assistance then please direct it to this list rather than me
personally, so that Linas, Ben, or another of the mentors can attempt
to assist you.