I was going to post this in the thread where price and carts for the x900 printers were being discussed, but that thread got so confused I figure my comment might get lost. Since this is an important tidbit to many, I figured I'd post this info separately.
Anyway, I just wanted to mention that I'd see a price listing for 150ml carts for the x900 series. They were listed at $89.95, and I'm sure they were for the x900 printers, as they included the orange and green inks.
Perhaps this is Epson acknowledging that these printers won't just be used in proofing. Or maybe they read this forum and have noticed how many people are interested in the new printers but are concerned that the larger carts exceed their needs. Anyway, I figured those people would be interested to know about the 150ml carts.