On most android platforms, you can boot the device in silent mode and the startup sound will not play. Unfortunately, there are no other factory options for disabling the startup sound on the Springboard. Be sure to check out other threads on this topic.
Thank you and have a good day!
I tried putting the tablet in silent mode and booting off. Turning it back on still gave me the loud Android playing the T-mobile chimes. And once it was booted on it was still in silent mode.
I tried using Silent boot from Market. But it really is set to quiet the shutdown noises (which the Springboard doesn't have).
I guess I'm stuck with the noise that forces me to shut the thing under pillows when I'm at home. I appreciate your help and suggestions even if nothing came of it.