Yesterday (09 Sep. 2009) Sun released a new maintenance release for VirtualBox

[it contains only minor fixes, ebuilds are available

on jokey's overlay[1] as usual ;)

UPDATE:

Due a critical bug[2] virtualbox upstream silently updated (the official

announcement should be posted later) the virtualbox-bin amd64 binary[3]

i just revbumped on jokey's overlay[1] app-emulation/virtualbox-bin to 3.0.6-r1

[1] http://overlays.gentoo.org/dev/jokey

[2] http://www.virtualbox.org/ticket/616

[3] http://vbox.innotek.de/pipermail/vbox-dev/2009-September/001822.html