I went ahead and converted ESX instances Ronald was testing back to stock 8.04 installations, and the amd64 instance has reproduced the freeze behavior three times in a period of a couple of hours (the first time was the first boot post-installation.). I've updated the kernel to the latest in hardy-updates to verify that it's not a userspace related issue, but given that the prior 8.04.2 installations showed no signs of the freezing behavior, I'm convinced this issue has been addressed.
I went ahead and converted ESX instances Ronald was testing back to stock 8.04 installations, and the amd64 instance has reproduced the freeze behavior three times in a period of a couple of hours (the first time was the first boot post-installati on.). I've updated the kernel to the latest in hardy-updates to verify that it's not a userspace related issue, but given that the prior 8.04.2 installations showed no signs of the freezing behavior, I'm convinced this issue has been addressed.
Thanks for everyone's patience.