32GB eMMC Flash + 1GB RAM: http://www.samsung.com/global/busine...=7626&iaId=860
The series offers other combinations too, many of which still not in mass production. Some are allegedly available as POP (dunno if for OMAP).
Anyway a seemingly viable alternative to our flash-only eMMC in N900 that offers same flash storage capacity plus an additional 1GB of fast RAM. http://fuchaoic.en.alibaba.com/produ...00VM_B604.html

CAVEAT: it's still not 100% clear to me that Samsung actually means (M/G)Byte and not bit (as storage manufacturers usually do), in those docs.
Anyway look here for what I consider is a PoP for OMAP et al. Max 512MB RAM. So Neo900 most likely will have 512MB PoP RAM, plus 1GB of really ultra fast swap, which should be even better than 1GB of plain RAM with no swap at all or flash-based swap that's extremely slow. For all practical purposes the user experience will be that of a device with 1.5GB RAM (and we don't need to do any special trcks to maemo5 kernel and core system, it just uses 512MB RAM with 1GB of ultrafast swap - instead of 256MB RAM with 768MB of extremely slow swap as is now on N900).

Evaluation if such chip even can get connected to Neo900 DM3730 SoC and circuitry is ongoing! (usual problem: no datasheets publicly available)