The title might not be that spectacular, but it's very satisfying to see the display and the SD card coexist. While the display is fed via DMA, I can pause the DMA driver and use the SPI to write to/read from the SD card using sdfatlib (https://code.google.com/p/sdfatlib/). Now I can have fluent graphics and read celestial object data from the card in the background. It's time to create widgets for this thing!