This is in addition to the firmware problems we have been having with the MTU through Xbox on the 2Wire Telus brand router once it has been firmware reset (and ultimately bricked). You can follow the first part of the post here: http://www.filearchivehaven.com/2011/02/20/telus-2700hg-e-firmware-and-usage-off-of-telus/.
I believe this definitively shows that this unit cannot support ddwrt (freeware firmware).
I finished tearing the unit apart and wanted to post some photos. To open it easily, just use a screw-driver in the air-slots. You will find two long plastic clips near the edges that need to be pushed in to release the covers.
Higher quality photos are below. Including the CPU which has a custom 2Wire Ares CPU. And a NAND memory chip at 128MB.