Here's my progress of the day:
17" MacBook Pro (MBP 6,1, 256GB Crucial C300 SSD, 8GB RAM)
Using d3vi1's application of build date 11/4/11.
Goal: Get OSX Lion & Windows 7 64-bit SP1 running with EFI
So basically I started all over again...
1) I used Disk Utility on the OSX Lion USB drive I made to make 1 partition, GUID, and just Free Space.
2) Fired up the terminal, ran "diskutil zeroDisk disk0" to start with a truly clean slate (No need for TRIM here

)
3) Quit Terminal, fired up Disk Utility again.
4) Partitioned into 2 equal partitions. 1st is HFS+ for OSX, 2nd was just Free Space, and again using GUID.
5) I installed OSX Lion, updated. It's working fine.
6) I then proceeded to install Windows 7 64-bit SP1 under EFI using d3vi1's instructions. Got it installed. I'm still having issues booting properly, noted below.
As part of the beta requirements, d3vi1 wants us to send us a dump of what his EFI application spits out when you run it. Well, I can't get it to work.
When I run his EFI Application, the USB drive flashes for a few seconds, indicating some activity, but then goes into standby where it pulsates (Sandisk). The command line just remains with a "_" meaning that it's busy. Capslock no longer works, so the computer is frozen.
When I put his application into fs0:EFI\Boot\ as bootx64.efi, Windows will boot fine, but the graphics does not show up properly. I've blindly navigated Windows, to shutdown. I can change the volume, and the volume "Blip" plays as it's changing. So it's running.
This time around, I smartly enabled remote desktop so I can see more of what is going on. When using his application, the Intel HD graphics card shows it's ugly head. From what I understand, d3vi1s application is supposed to block the Intel HD card from Windows for now, and configure the gMux, or the graphics card selector to switch to the nVidia card. It's not doing that in the 11/4/11 build.
Even if I disable the Intel HD card from the device manager, it will not work. The only way to get Windows to boot properly is to manually start it up using the "mm 001f0290 60 -PCI" command, and to manually launch the original fs0:\boot\bootx64.efi. In this case, the Windows boot animation shows up, and Windows 7 works as you would expect it to on a Bootcamped Mac. Screen brightness works.
To note though, when using d3vi1's application, Windows does boot; however, the boot animation is gone and is replaced by the gray boot screen, along with some black blocks, where I assume his application wrote something to the screen. Screen brightness controls do not work when using his application, but do work when manually booting Windows 7.