http://www.soundblaster.com/products/mp3+/
I picked this up for $40. For about the same price as the imic, you get nice inputs and outputs (have not tested the RCA jacks in YDL yet), as well as a volume control on the unit. Check it out! Plugged it in YDL 4.0.1 and it works. Shows up as /dev/dsp1, so in xmms I had to choose OSS output, and click the box to use other location than the default. I put in /dev/dsp1 and it works. You could edit your /etc/modprobe.conf so this is your only, and default sound card if you would wish to.
Check it out! Btw- it works in OS X too, flawlessly, as well as Mandrake/Mandriva Linux. Plug in and works.
Scott