I've been hacking around with this box... some differences from the plain G.
1. Uses mips big-endian mode, so you have to make a new toolchain. Not compatible with Linksys binaries
2. Only 4MB Flash! I've built a kernel with squashfs and an extra mtd partition for the spare space, but don't anticipate having more than around 2MB free even if I strip the image bare. btw. their hacked kernel 2.4.18 kernel contains bits of 2.4.19, some CVS directories, all sorts of crap, so it's difficult to strip out their changes. They also statically link some proprietary stuff into the final kernel (GPL issues???)
3. Their kernel has lots of stuff extra like ebtables for bridging... not used by the shipped frontends but could be useful.
4. Netgear provide all the tools to create a new image, so there's no guesswork. If you run their script on a default binary it produces an identical image to the release image, so seems to be OK.
# cat /proc/cpuinfo system type : 96348GW-10 processor : 0 cpu model : BCM6348 V0.7 BogoMIPS : 255.59 wait instruction : no microsecond timers : yes tlb_entries : 32 extra interrupt vector : no hardware watchpoint : no VCED exceptions : not available VCEI exceptions : not available # cat /proc/version Linux version 2.4.17 (root@Run-P4) (gcc version 3.1) #326 Thu Mar 3 16:49:23 CST 2005 # cat /proc/mtd dev: size erasesize name mtd0: 00286000 00010000 "fs" mtd1: 003e0000 00010000 "tag+fs+kernel" mtd2: 00010000 00002000 "bootloader" mtd3: 00010000 00010000 "nvram" # free total used free shared buffers Mem: 14016 12140 1876 0 1332 Swap: 0 0 0 Total: 14016 12140 1876