These were various locations for the sources for some of the BCM6348 based routers. They include sources from Asus, Belkin, BT, Siemens, Inventel, Linksys and others.
Netgear DG834PN, DG834GT, DG834GTB
If you don't require the ADSL modem to work then I suggest looking at Openwrt as that now appears to work for all options except ADSL, using only Open Source code with no closed binaries. Very Impressive. I have started to look at this and will work on building cramfs and squashfs images.