Duh... I had seen this before but hadn't processed it properly... KTSF, Channel 26 San Francisco, has an ASP-fed schedule which lets you filter by language. The listings include information about available subtitles and (few) SAP (second audio channel) programs. KTSF comes in intermittently for me, but if DishTV punks out then I can look into strengthening my local antenna rather than paying cable or DirectTV costs just to get better local signals.
(The website of KMTP, Channel 32 SF, says that they're currently evaluating broadcast changes. They'll have a focus session on Bryant St. Thursday evening. I'll probably be pretty whupped by that point next week, but will see if I can attend and present the "concerned gaijin" viewpoint.... ;-)