In case one may have forgotten, San Francisco Opera's season returns next week to the War Memorial Opera House. They've put up new banners and posters, and are sponsoring public radio again. I've looked at my schedule for June 2nd through July 6th, and even if I only hear Das Rheingold and Lucia twice apiece, I still will go to 18 SF Opera or Merola events. This is opera escalation if I've ever seen it, and I do feel concerned. Speaking of which, last week I saw a poster for Das Rheingold at my local burrito shop. Summer madness, indeed.