Well Jimmy Wales is a kinda notable dude to be bickering directly about it with other internet-famous public figures.
Second, any serious observer of the programming languages would conclude that Odin is in the top 2-3 contenders for the long-term replacement of C. Even if it never attains the goal of supplanting C, I'd argue its historical importance (within its field) is already on par with Betamax or HD-DVD (adjusted for time inflation).
Finally the field of programmers who are able to work on programming languages they made as their full-time profession is extremely rarified, maybe 10-20 individuals at any given time. It is the ultimate measure of having made it -- what we all dream of. At that point you're practically royalty to programmers, and many will know you by name. That is the level of fame (for there is no other accurate word for it) that gingerbill has attained in this community. This dude is a hall-of-famer. Already. Without a single story written about him in a newspaper!