What coding language is used to make games for the video iPOD? Is
there any current information for developers?

The correct capitalization is iPod.

see http://www.apple.com/ipod/

Apple doesnt not provide the API or framework to write custom
applications/games for iPod, the reason (in my opinion) is not the
reveal internals of Ipod to development community to hack it and play
non-itune songs etc:)

if you really want to do something cool for ipod you can start with
installing linux on your ipod:
http://ipodlinux.org/Podzilla

IPod has an ARM based processor and you would find a lot of code
snippets in podzilla. I did try installing it on my ipod mini but it
didnt workout well.
Make sure you read the installation instruction carefully and know the
concequences of flashing your ipod.

another thing you need to keep in mind is that ipods have click wheel,
you need to design your games properly to optimise the use of click
wheel.

hope this helps
cheers
sushil

This is from the book gaming hacks.

http://books.google.com/books?ie=UTF-8&hl=en&vid=ISBN0596007140&id=zrqz84QUuSEC&pg=PA70&lpg=PA70&dq=gaming+hacks&vq=ipod&prev=http://books.google.com/books%3Fq%3Dgaming%2Bhacks&sig=EOoe53Rk5J2J52gGIZSwSCQCUx0

Podizlla only works for 4th gen and previous... make sure to read the FAQ's

Since the Ipod is a closed source device, there is no official SDK.

Programs written in C can be cross-compiled to work on the ipod's arm
platform. Files compiled in this manner need to be added as a module
to the PODZILLA software which runs under IPODLinux. To add the module
you need to compile PODZILLA with the module and a header (written in
programmers notepad) added in the correct directories.

Full details here:
http://ipodlinux.org/IPod_Programming

It is also possible to program at a lower level, without running
Linux, however this is complex and currently still exploratory, The
language used is C and again an arm targetted GCC cross compiler is
used:

http://www.dwelch.com/ipod/

In order to get this code running, you need to inject it into the
Apple update distribution, much the same way that the IPODLinux
installer works.

Hope this helps.