Hey Have fun in Deutschland! (I lived there for a little bit) About your question on iTunes. They encorperate the DRM into the music and then when you buy it they send you a copy of the file and then they a certian portion of th 99 cents the the record company. The DRM prohibits you from storeing/playing/syncing to iPod on more than 5 computers registered in your name. It also stops you from burning it on CD's more than 5 times (They like the number 5 ;} ) Other than that, you can listen to the song all you want and put it on as many iPod's as you own. After all that i sugest buying iTunes Plus Songs (Srry 4 of topic) They have NO DRM.
(thers a mouthful, or two )