Here is a list of free classical MP3s I've found using the latest pre-release of the XUL based, cross platform music app Songbird.

It is a great combination of web browser (based on Firefox's XUL), and music player (bears a certain resemblance to iTunes, but certainly isn't limited to any specific hardware MP3 player like the iPod). If you haven't checked it out yet, I certainly recommend it.

When you open a web page that links to music files Songbird recognizes them, and you can automatically play them, or download them. It hasn't taken me long to build up a sizeable Classical music collection.

So here is my (growing) list of top 6 sources of Classical music:

Catalog sites with lots of music:

• Wikipedia - Music sounds then follow the links to your favourite composers from the list
• The Piano Society
• Classic Cat - the free classical catalogue

Specific sets of recordings

• Columbia University Orchestra
• Boston's Gardner Museum classical music performances with older versions tagged with 'AISGM_Podcast' at the Internet Archive
• Serg Van Gennip's recordings