I have installed mt-daapd on my new Synology DS-106e, and it works great even tough I think it lacks some better browsing features, but that may be iTunes problem.
The reason for the install is that I want to be able to stream my music to my laptop whereever in the world I am. is that possible? I am using the newest version of iTunes and it might be down to me not understading how iTunes works. Atm when both the server and the client is on the same LAN it just shows up, I belive i need to do something active to make it work over the internet.
Here is a place to get started, it should have all the info you need.
Yell if you need more help.