I was on in May and I don't believe they have such a facility. I agree with the previous poster, get an extra memory card if possible. The other thing you can do is bring a laptop along and transfer pictures from the camera to the laptop as you go, thus freeing up space.
Now posting as MichelleP.
You should just get another card....another 256 will only set you back $75 or so, and it will be less costly than any service they might offer for such. Or if you have a laptop or a portable hard-drive take it.