I wouldn't normally make a topic like this, but since it's a big problem for me I thought I'd ask if anyone else has this problem, since nobody seems to from what I've researched.
All these options like "Find artwork" and the new "Genius" are all well and good if you keep all your musical files on your computer, but as I have over 5,000 songs on my iPod I tend not to clog up my computer hard-drive with them and ergo delete them all (at least most) once I put them on my iPods. The files are forever on my iPod and they are in hidden files so they're not going anywhere. (I also bought a 2nd iPod because I'm rich and it was only $300, so I have a back-up in case one iPod breaks)
And these bloody iTunes special features do not work for files actually on your iPod!! Isn't that the stupidest thing ever?? So inconvenient.