Here are some of the more easily removable parts...
Smart card reader socket
22.1184 xtal oscillator
2 slot IDE connector/pc board
4MB RAM SIMM
1MB FLASH SIMM (proprietary pinout)
8VAC 2AMP wall transformer (actually its
on of those that sits in the power
plus a bunch of connectors and other misc parts.
Most of the big chips are probably too difficult to remove.
They are the CLPS7500 ARM CPU, an SMC SuperIO chip,
a CHROMTEL CH7001a RGB->NTSC/PAL convertor and
a CHROMTEL CH9294G clock generator.
Personally, I think they are more fun as a low end linux server
by adding an ethernet card and a Compact Flash disk via
an IDE<->CF adapter. No fan, no heat, no noise.
But that requires a fair amount of hacking.
In terms of hacking, its not an "ftp and go"
kind of hack. The most difficult issues are
reprogramming the flash (I personally built a programmer
to do this) and the need to build your
own kernels/applications (e.g. no JailBait
prebuilt distribution ala iOpener).
The IR keyboard works
pretty well to enter text into a ReplayTV
system (although not well enough to
completely control it.). I use one when
I'm too lazy to enter in the text via the
remote for program searches.