My Chinese office mate just brought in some of these things. I've heard about them but haven't been able to find them. They're not really "peppercorns" but are some kind of berry from a species of prickly ash (or something like that). He says all real Sichuan cooking (in Sichuan) uses these along with chiles but most "Americanized" Sichuan cooking does not. When you chew on one of these pods, your mouth starts salivating like crazy because they're very tart then a very interesting buzzing sensation takes over your lips and tongue. Never had anything like it. Jeff Jeffro's Serious Sauces (if I get any damn chiles in my pathetic garden this year)