Linux 2.4.21 is now out and the new package is ready to go. Instead of the old initrd for SCSI systems, I've split the kernel into two separate packages, kernel and kernel-scsi. IDE users should use the first one and SCSI users should use the second.
Note that you may have to manually remove the 'arch-initrd' section from lilo.conf, as initrd.img no longer exists.
I've also added JFS support. You'll need to install the jfsutils package if you want to try it out.