While I wouldn't define myself as an "opera buff," I definitely am more interested in the old-school production style than your average joe on the street, I suspect. But talk about a phrase I never expected to hear in my life: "doujin opera"?
But Canned Dogs reports that such a thing is in fact going to happen: a "doujin" opera adaptation of Higurashi no Naku Koro ni (alias When They Cry) will be performed on March 13th, and tickets are only ¥2000 (about $22 USD), which I will tell you right now is SUPER cheap for an opera. Hell, those movie theater screenings of the Met alone are $25.
You can also check out Hatsune Miku'd versions of the songs right here, though for a human singer you'll have to see the opera live. Or wait for some enterprising otaku to upload video of it to YouTube.
The music itself is pretty good, by the way. I'm not sure if I'd call it "opera" so much as sort of dramatic pop-- maybe more of a musical than a formal opera --but I guess I'll have to hear how the singer delivers it to say for sure.
That said, I would go. I'm not in the least bit interested in Higurashi in and of itself, but a Higurashi opera just sounds too neat for me to miss. If I had an opportunity to go, that is. How about you?
(Missed it-- found it credit goes to AICN Anime.)