Can anyone tell me if the apple keyboard's (both the wired and
bluetooth wireless) have usb ports on the side, to enable me to
connect additional hardware?

Also, is it possible to attach a mighty mouse to the keyboard via one
of these ports? or does a mighty mouse use too much power?

Hello Domdomdom,

Let me break your question into three parts so the answer is clear.

Q1: Does the Apple wired keyboard have USB ports "on the side"?
A1: Yes. (they are adjacent to the USB cable coming in to the keyboard
- away from the keyboard user).
http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs-G5/PowerMacG5/3Input-Output/chapter_4_section_9.html

Q2: Does the Apple wireless keyboard have USB ports "on the side"?
A2: No. There are no USB ports on the wireless keyboard.
http://docs.info.apple.com/article.html?artnum=86651#faq4

Q3: Is it possible to attach a mighty mouse to the keyboard by one of these ports?
A3: Yes, but. Notice that there are power limits to "bus powered hubs"
as described at
  http://docs.info.apple.com/article.html?artnum=50468
As described at this page, mice (such as mighty mouse) are considered
"low powered" devices.

To find this information, I used search phrases like
  keyboard site:apple.com
  wireless keyboard site:apple.com
  USB power site:apple.com

If you find the answer incomplete or unclear, please make a
clarification request. Good luck with your system.
  --Maniac