I can only second what the previous people have said. Rockbox sure is an awesome little piece of software.
Among other things, being able to listen to my ADX, SPC and NSF files without needing to convert them is really convenient.
I'm living in Hamburg, Germany. Trying to spread the word to everyone I know, of course I have added myself on the map a while ago, back when I was still known as "Dr. Sophie", so that's my name on there