There is an OTA update for the Droid Incredible that is supposed to appear pretty soon. In addition to wireless-N, 720p video recording, and a mobile hotspot, you will also receive a new boot animation, and frankly it is pretty incredible. See what I did there?
If you can't wait for your OTA update, you can put the new boot animation on your phone today. This will work for both rooted and non-rooted Droid Incredibles.
First you will need to download the new animation here.
You need to have adb (Android Debug Bridge) installed. You can get that by installing the Android SDK. You can find a guide for that here.
Extract the two files to a directory where you will remember them (the android-sdk/tools directory is pretty good).
Open a command line/terminal and navigate to the folder where you stored the two files. In Windows, you can SHIFT+right click within that folder and click "open command window here." In a terminal (Mac or GNU/Linux), you use the cd command. Like this:
After plugging in your phone and enabling debugging, Settings/Applications/Devolopment, type in these commands:
adb push bootanimation.zip /data/local
adb push android_audio.mp3 /data/local
Note that the audio file might not work the first time, but if you try it a few more times, it should work.
After it reboots, it should reboot with the new animation! Enjoy!