@Napalmer -but once it has an accompaniment I don't think it can be classed as [url=http://www.last.fm/tag/a%20cappella/wiki]a cappella[/url] any more? I hope you've shouted on the tags for metal/dark metal etc; it might be of more interest there.
Listen new single of ukrainian dark metal band Tectum feat. a capella female band Budnitay
[artist]Tectum[/artist] - [artist][track artist=Tectum]Shchedryk (Carol of the Bells) feat. Budnitay[/track][/artist]
download links and comments in my journal: