I am about to buy my first CISS here:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220615143311&ssPageName=STRK:MEWNX:IT#ht_1762wt_1123
I am told by the seller, that I can buy both matte and photo pigment ink.
But I am a little confused about how the chip in the CISS cartridge 'knows'...