There are similar issues being found with the Fedora 7 Live CD and Installation DVD during boot. It seems that machines using SATA drives will get as far as "Ready." being displayed on the screen, and then go no further.
You can read more about the issue on the Fedora Forums at:
There is also bugzilla report for this problem that can be found at:
I'm having trouble on my two Dimension E510 machines that each only have a single SATA drive in them. I haven't yet gotten to try unplugging the drive until after the hang point and then plugging it back in, as has been suggested multiple times, but I will tonight.
It has also been suggested on some forums to add grub options maxcpus=1 and/or clocksource=acpi_pm to the kernel boot parameters on systems that were able to get F7 installed but not to properly boot on subsequent reboots.