How to Sync iTunes library on multiple computers?

I tried several applications, including Syncopation, but they are all partially working, with issues and unreliabes.

Also, if you don't keep the library at the same cordinates in the disk, they could not work on every computer.

What's nearest to a valid solution is Martian Slingshot, which doesn't give anyway the "set it and forget it" definitive solution.

As far as I know there's no app that can provide the same seamless experience of syncing itunes to an Apple Tv"!

I have investigated the issue because of myself and the happines of speakers on computers that I own. In my situation there is one "unmovable" Mac and HP tourist (laptop) - the sync should not make these two dependent from each other.
The perfect solution with a storyline would be: my friend borrowed me some music CDs which my stationary Mac would rip into the local library and synch the music (+ data, counters) to the other local library on my laptop, from which happy sounds would be heard on a roadtrip the next day (no network or internet needed).
In practice that would mean all the .mp3 files, the master library (.lib) file and the files containing ratings & counters would be copied once a day using just a smiple batch command or Automator script for the Mac.

Note that there already are some solutions for always-connected-to-the-internet machines are available trough basic functionalities of the OS and iTunes itself. Here is a tutorial for "syncing" between two or more Windows computers.

Any other comments appreciated, I would really like to solve this one. Aslo don't forget the Twitter button to spread this question around a bit.

Still looking for a viable solution, I'm getting disconforted.

There is the big news, it came out minutes after Apple's music event on the 9th of September.
They have released an new iTunes version, numbered 9, which has a new feature called home sharing (look!). The A promises syncing all content (including applications), logged in with the same Store account, however when syncing a computer is authorised to do so with a "passcode" written inside the iTunes Library configuration file - I do not if that is transfered, as I did not try doing these steps yet.

Upgrade to iTunes 9, explore the Home Sharing feature and let me know

P. S.: It looks like Apple really is monitoring the discussions over at GS ...

Home sharing only allows syncing over the same network. I am trying syncing by placing my itunes folder on mobile me. It kind of works but I frequently get errors. I might give http://www.supersync.com/ a shot.

Well I'm guessing you've heard of iTunes 9 by now and the feature called home sharing, it allows you to copy files from any computer to another that is authorized to the same account, very useful and would be strange to be without it.
Sorry if I'm a bit late.

I tried home sharing, and it's not bad, altough it only cares of syncing the media, while other meta data like number of times you played a song, rankings and so on are not being synced.

Also, as you may know, only iTunes purchased media syncs automatically, anything else shouldbe drag'n'dropped from a computer to another.

While it's a good step forward it's still quite far from a "sync".