i have that exact same keyboard...came with my 486, oldie but a goodie
anyways, one of the more creative keyboard mods ive seen is
here
i dont know of many people with a need for that stuff, but other things might be useful. ive considered stickin a vfd or lcd display at the top of my keyboard (there is definitely room), instead of in a 5.25" drive slot. also as per
this howto i really wanted to move my cd drive buttons and lights to the top part of the keyboard, and then stealth the drives...but stupid non-standard switches and lights killed my fun.