I assume that demand in such functions is existing. Unfortunately, the 600 is not as easy to hack as the 505. Kartu made PRS+, but the only thing I could help with was the manual. I did the russification hack as I wanted to have the clock display at the bottom of the page. But the main purpose was obviously to provide a russified menu and font. So the clock came as a bonus. I would love to see more hacks but I think we'll have to wait longer for that. When this all started on the 505, there weren't so many readers on the market. If the 600 stays long enough, there might be some more hacks, but actually, I think there'll be some newer readers out there that provide what we want before hacks are programmed.
I still wait for color e-Ink. I just love the display type and battery durability. I wouldn't want something like or similar to the Ipad