I own both a Bionic and a D3 and noticed in the Bionic section this post;
Droid Bionic Custom Boot Logos
s.dubs317 was nice enough to resurrect a boot logo I had for my OG and not only did it work on the Bionic but it works with my D3 as well.
You will need the TeamBlackHat app and the P3Droid Droid3 toolbox which can be obtained through that app. Follow s.dubs317's instructions and you'll be all set to have a custom boot logo on your D3. s.dubs317 is currently accepting images to be edited for use as the boot logo so head on over there and give s.dubs some love.