In just 18 hours, I've automated the retrieval of the remaining 10,536 of my digital albums which were missing cover art, located and applied covers to 1,680 of them, (as the rest were non-commercial albums with no art to retrieve), and verified the applied covers with only 4 incorrectly assigned - a margin of error of just 0.23%.
For an encore, I installed a package of 66 user-configurable graphical layouts for the player application, selected my favorite and tweaked it to best fit my needs, added a lyrics plugin panel which scrolls in real-time with the audio, and activated a lovely desktop applet to control my music from the desktop.
gmusicbrowser's custom graphical interface with album art updated and newly-applied lyric plugin
Desktop environment with interactive player applet at the left.
Example of dynamic controls from the applet.
Yay for productivity!