From: Chavdar Ivanov <ci4ic4%gmail.com@localhost> It's not that important, but it is convenient to have development NetBSD machine running under VirtualBox hosted on Solaris 10/11 ZFS filesystem, only for the easy snapshots. I have OpenBSD, FreeBSD, a few Linux instances and a whole skyscraper of Windows VMs for that sort of purposes.
Not that it particularly helps but NetBSD current and netbsd-5 have just recently been adjusted to handle the acpi implementation in qemu so you can reliably use that to test NetBSD in the interim...