mod_bandwidth has been upgraded to version 2.1, the actual ebuild doesn't work (bad MD5, as the URL doesn't change when version change), just copying the 2.0.5-r1 to 2.1 version works just fine.
Works fine on ~amd64.
mod_bandwidth is an Apache1 only module and was thus masked, pending removal on 12 June 2007 together with the rest of Apache1 stuff. Best regards, CHTEKK.