Actually 512MB flash isnīt bad.
The real problem with this new batch is the buggy uBoot they used, it cannot boot from external SD and it hangs with some USB storage devices. I booted with a GuruPlug uBoot and it starts and recognize the NAND, so I started to compile a new uBoot which is a DreamPlug uBoot with bits from GP board definition to allow NAND, so far it compiles and loads but it cannot see the NAND and Iīm a complete noob with uBoot
Since kernel is modular I think it can be modified to support SPI NOR and NAND on the same Kernel but it seems hard to do the same on uBoot in order to have a generic DP uBoot too
BTW it also comes with rootfs on NAND flash... UBIFS fs