I bought a Graph Link cable from MussiLabs.  This guy has quick 
service and didn't just send the cable.  I got an interface program and 
some games for my calculator.  I'm pretty impressed.  Anyway, I 
checked with him and he said he can sell me SPEAKERS for my TI calculator.  
Has anyone ever heard of the speakers?  I didn't see them listed on his 
page, and I didn't ask how much he was selling them for, but I think it sounds 
neat.  Check him out at 
http://www.geocities.com/SiliconValley/Lab/1788/