(debated if this should be here or notebooks & linux)

I don't know if what I want to do is practical or not, I'm hoping you guys can help with that.

what I want to do is set up a computer, preferably running some version of *nix, to record sermons etc from the podium mic at church directly to CD (no need to store a copy on the hdd first). That is the only task it needs to perform, and can even be headless once set up. We have an el cheapo mixer (doesn't even have a line out jack, just speaker wire connections - willing to upgrade if necesary), and the mics and that's about it.

What I'd like to know is:

1) is this feasible?
2) what additional equipment would we need (if any)?
3) what hardware would the computer need (ie second sound card? etc)?

Thanks,

Louis