Not to be an ass but...
I'd rather hunt down all of the rituals myself than register to another forum.
Your point is noted, and I sympathize. However, for whatever reason I can't add an attachment here, as much as I'd like to. Any suggestions?
FWIW, if you're into online D&D forums, (and you're here, so you must be), you should check out ENWorld as well. If you've never heard of it before, it's a major pillar of the online D&D community, and a lot of folk from here post there as well, including numerous WotC Staffers. Suffice to say, it's a highly-respected D&D forum, and you ought to check it out! (It's the #1 place for D&D news, as well.)
But you're not here to be sold on joining another forum, you're here for a PDF Ritual Index. Any ideas about where else to host it, so that you won't have to register to download it? It needs to be somewhere permanent.