Some of the Toshibas (usually the Satellites, but also, occasionally the Tecras) refuse to boot off cdrom media with bootimages larger than 1.44M (7.0 had a 1.44M boot image, 7.1+ has 2.88M boot images).
Reference: http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=47288
Aurora:
The original bug poster for the sun4c problem submitted a patch that seems to resolve it. I'm still confused about using a sun4c as a high traffic mailserver, but hey, whatever floats your boat. I'll add the patch and respin the kernel on Monday.
Sun is now offering a SunBlade 100 for the show instead of the Ultra 10. They offered me a whole list of stuff, and I picked the SunBlade (so did the Debian team). It will give me a chance to try to fix some of the X issues, and hopefully, we'll have a working installer by August. *cough*
We're in the middle of the migration, and the mailing lists are down. Just be patient, they'll come back up, I promise.