I've put a bootable ISO image of the 20000620-1.5 snapshot on my ftp site. I
was able to burn this .iso and boot my G4 350 'server' with it.

Info:
 Size: ~62MB
 Boot (in OF): boot cd:,ofwboot.elf
 Format: ISO9660/JOLIET/HFS w/ a HFS partition table
 Notes: In CD install, you will need to change the path from
            /macppc/binary/sets to /binary/sets
 Site Notes: Site may require passive ftp
 URL: ftp://24.22.6.74/Alpha1.5bare.iso

Mike