Milkytracker-0.90.85 source cannot be found in any mirror I've tried. Also, the HOMEPAGE and SRC_URI in the ebuild are wrong, please replace 'www.milkytracker.net' with 'milkytracker.org'
I could swear they worked yesterday. ;-) + 01 Nov 2010; Samuli Suominen <ssuominen@gentoo.org> + milkytracker-0.90.80.ebuild, milkytracker-0.90.85.ebuild: + Fix HOMEPAGE and SRC_URI wrt #343741 by Jouni Rinne.