I came across a practical media converter that can convert DRM media: WMA, WMV, ASF and other video/audio: WMA, M4A, AAC, AC3, WAV, MP3, WMV, ASF to MP3, WAV, AAC, MP4, AVI, FLV, 3GP, etc. With this media converter, you can easily remove DRM and convert popular video/audio to many players such as iPod, PSP, Zune, Creative Zen, Archos, Mobile Phone, etc.
However, the free download link is only available for 24 hours: http://www.giveawayoftheday.com/daniusoft-media-converter-2320/