I've heard of 800MB CDs, but I never see them in stores or online.
I know there are something like 1.2GB CD's but you have to have a special burner for them... double density or something like that.
But supposedly there are rare 800MB discs out there. Apparently they're not that uncommon, but a lot of people share movies that are around 750MB and these won't fit on a 700MB CDR let along a 650MB (who uses those anymore? lol). I could use TMPGEnc to convert to MPEG and split the files but that's a lot of work.