I have had a look at the source code provided by Edimax to work out what the device is, and had a poke around Inside The Case.  The findings so far are:

Hardware

Item	Description	Notes / Source of information
System Board	Prolific Pl-1029	29/src/ipcam/web talk about Pl-1029, and the top level instructions say you should install the toolchain in /opt/prolific.  This is confirmed by more recent look Inside The Case.
CPU	ARM9	Both from Prolific web site and the provided toolchain is for an ARM processor, using uClibc.
USB Support	No connector installed, but the Prolific web site suggests that the hardware is present.	Need to gain telnet access to device to check - not done yet.     There is no sign of a USB connector on the main circuit board, which is a shame.
Wireless LAN Adapter	Ralinktek RT61	Edimax supplied source code for RT61.o/RT61.ko module

System Software

Item	Description	Notes / Source of Information
Kernel	Linux 2.4.19	Edimax supplied source code
System Binaries	Busybox 1.01	Busybox is also the init process, called as /linuxrc

The dmesg output from the device has been de-coded and posted here.   The output is re-produced on this site as dmesg Output.

Firmware File Structure

Bytes	Description	Notes / Source of Information
1-8	Character Description	"IC3010  " or "IC3010WG" - from ./29/img/mkImage.sh in source code provided by Edimax.
9- 768k    or 9- 767k	Kernel image	mkImage.sh suggests this goes to 768k (=786432), but my testing suggests it ends at byte number 767k (=786370)
768k- (786432-)    or 767k- (786370-)	Cramfs root filesystem (3580k when mounted)	Again mkImage.sh suggests 768k, but my testing suggests it starts at byte number 767k.  This looks like the root filesystem for the device.