Today, after a beta testing period, VirtualBox 2.2.0 was released,
i just bumped the ebuilds for:
To build this release of virtualbox-ose updated versions of dev-util/kbuild and net-libs/gsoap are needed, respectively:
I hope to bump the rest ( virtualbox-guest-additions; xf86-*-virtualbox ) tomorrow,ebuilds are on jokey's overlay and all the additional files required are present on my website as usual.
 The minimal requirement is 0.1.5 r2274 the one present in portage and currently available for download is 0.1.5 r2259] so i created an updated tarball.
 This dependency is needed to build the vboxwebsrv webservice.
I just commited to jokey's overlay all the missing ebuilds,
it took more than expected due to various changes to the build system,
and on the sources (especially for xf86-video-virtualbox were ugly
hacks were implement to build the opengl part).
I suspect that the video driver (xf86-video-virtualbox) [that is built from
OSE sources on gentoo] is not 100% compatible with linux guests running on PUEL (virtualbox-bin) hosts, some OpenGL components for this driver are not part of the OSE distribution, stay tuned