You should be able to hit 'F2' to interrupt the EFI boot sequence and then choose to boot from the SD card. I'm having some trouble doing that, so I end up waiting until the grub menu comes up, then hitting 'c' to get to the grub command like, then 'quit' to exit back to EFI, where I am finally given the boot options menu.
For the resize problem, I'm working on a v1.1 image that should have the necessary fix for resizing.