I received two of the 23k256 breakout boards around 6 months ago and I've only just got round to building them. As I received two, I decided to try fitting a serial flash chip to one of them - I saw that microchip did a 32 Mbit flash with a similar layout, the only difference being that pin 3 had to be pulled high rather than not being connected. I haven't tested them yet, but all the connections seem good.
23k256 sram
(http://http://img857.imageshack.us/img857/1517/dsc0014tv.th.jpg) (http://http://imageshack.us/photo/my-images/857/dsc0014tv.jpg/)
32Mbit serial flash
(http://http://img190.imageshack.us/img190/1588/dsc0018uf.th.jpg) (http://http://imageshack.us/photo/my-images/190/dsc0018uf.jpg/)
Nice work, good to see it working with a flash chip too. Thank you for sharing.