I've been trying to boot my Macbook over the network to install Windows 7 from my WDS server. The EFI doesn't support it however. Neither does the Mac want to boot the discovery CD I've created. Searching the mighty internets for hours has revealed nothing.
The solution is to trick the Mac into BIOS emulation mode. This will make the discovery CD work. You enter BIOS emulation mode by starting the Boot Camp assistant in OS X and pretending you want to install Windows from a CD. Once the Mac reboots to start installing Windows, hold down the option/alt key and select your Windows partition (NOT THE "WINDOWS" CD). It will try to boot an empty partition and complain about it. Reboot and don't touch anything. It'll chime... go black... and ask you to PRESS ANY KEY TO BOOT FROM CD-ROM! =D (This seems like a bug, because it won't ask this if you don't try to boot the empty partition first.)
I'm installing Windows from my WDS server right now =D