How can I transfer pictures from a Macbook Pro to an iPad I don't own?
Not perfect for so many images, but the simplest known solution would be the cross copy tool. I created this Open Source project to target the ongoing hassle of inter-device file transfer:


Download and install the App called cross copy (or open http://www.cross-copy.net if you prefer the web app)
Enter the same code word on both devices (the more unique the merrier security)
start uploading files --- they will instantly appear on the other side


To be honest, the App should (and could) be extended to make multi file upload possible -- otherwise transfering a whole collection of images is much to cumbersome.