Auto-organizing all the tracks in the library at one time takes a long, long time. However, you can auto-organize all the tracks in a decade and then step though the decades quite quickly. I find this effectively allows me to auto-organize the entire library in just a few short minutes.

Do you mean to retrieve Album, artist, and genre info automatically in batch form for the whole library? If so, then no, MM does not do this. "Auto-tag from web" can tag tracks 1 album at a time. There is also a script that will batch tag your library with album art (available in the scripting forum, called Batch Art Finder) and another one that will tag the genre field (also in the scripting forum).

Is there a way to auto organize your entire library all at once?