just noticed this blurb.

[11/12/08 16:17:26] load_sample_ogg: Couldn't open sound/nfz.warning.enter.ogg (nfz.warning.enter)
[11/12/08 16:17:26] load_sample: Couldn't open sound/nfz.warning.enter.ogg (nfz.warning.enter)
[11/12/08 16:17:26] load_sample_ogg: Couldn't open sound/nfz.warning.leave.ogg (nfz.warning.leave)
[11/12/08 16:17:26] load_sample: Couldn't open sound/nfz.warning.leave.ogg (nfz.warning.leave)

I think those sounds are planned for later.