I think there's at least some possibility that it's Nufront's NuSmart 2815 instead. That was supposed to be showing in devices at CES 2011 and fits the profile described. It'd also make sense since Ramos is a Chinese manufacturer like Nufront. Rockchip, the manufacturer of the other SoC Ramos has chosen, is also Chinese.
U8500 is a smartphone platform with an integrated HSPA modem, which is not something every tablet owner wants. On the other hand, Nufront's chip allows SATA options on a tablet, like large SSD harddrives, and it should be all around much higher performing than any of the other Cortex-A9 SoCs announced, save for OMAP4440 which it'll have a more modest lead over.