The MPlayer Christmas Edition for Wii supports SMB
browsing. You can configure the login data of the desired SMB share through the
smb.conf on the SD card as follows:
ip=192.168.1.100 share=Public user=wii pass=somethingelse port=445
For it to work, you MUST use a dedicated user in Samba. Guest shares won't work. Also make sure you have
security=user set in your Linux
smb.conf. For more information see
this thread as tehskeen.com.