This is an excellent hint. I too have the same problem, and I basically just mirrored my library on both computers. Problem is, my iPod kept trying to sync to each library (a pain in the butt). So, I ended up resetting all settings on my home computer.

I use rsync for backing up tons of directories back and forth from home/work. My biggest suggestion for a future tweak is to get a more complete 2-way rsync_iTunes script, to keep an updated playcount list, etc. Though, it's not really that big of a deal, it would just be nice.

Does anyone have an idea how to sync a subset of the library - i.e. copying a playlist to the other machine?

I habe a library on my home PC that is just to large to even fit on my iBook without any programs istalled, so i'd like to keep only a selection with me when not at home. Right now I have no idea how to accomplish that - other than "delete library on ibook; manually select files from library folder on pc; transfer to iBook; add all files to library on iBook" which is not really a usability treat... I guess an iPod could do the same but at the moment that is not an option.

Any suggestions appreciated.