As outlined in [1], I have added code to NetBSD-current last week to also
build bootable kernel-only ISOs as part of the NetBSD 'build.sh release' 
process. In addition to the floppy images with integrated ramdisks,
the same kernels are now also available in ISO format for easier testing.

The new infrastructure is used for the i386 and amd64 port so far, and may 
be used for further architectures in the future.

Example ISOs for i386 are available at 
ftp://ftp.netbsd.org/pub/NetBSD-daily/HEAD/200606060000Z/i386/installation/cdrom/
there will be similar ISOs once the amd64 port builds again.

Enjoy!


  - Hubert

[1] http://mail-index.netbsd.org/tech-install/2006/05/11/0001.html