Now, I emailed them about this, and they told me the download edition is normally released about 6 weeks after the retail edition - ie. around the beginning of June for 9.3. At the time of typing, it's June the 13th, and still no sign. Fedora Core 4 is being released in a few hours. I'm very tempted to go there...
After some Googling, it turns out it may have been there all along - just not linked to on their official download page!
, or any good mirror of it. Even though it's in the i386 folder, they only seem to have one networked-install ISO marked as 'x86_64' - but that's not a problem to me!
(Just so any passing Gentoo'ers out there know, I'm not betraying the great distibution - it just happens to crash when I compile some fairly important things, like Mplayer... and Ghostscript, which many things depend upon... I'm told this is a known bug.)