I like this one, but I'd like not to lose ALL of the face buttons in the process.

I'd like this one, too, but I'm not super optimistic about it. 256MB seems much more likely.

I point you to a fun little quote from here.

The OMAP3440 is based on an 800MHz ARM Cortex-A8 core. Launched in October of 2005, the Cortex-A8 core was positioned as burning similar power to ARM11, while delivering two-to-three times better performance.

The OMAP3430 (the more likely candidate due to power and formfactor issues) is in the 600MHz range, but it's still a huge leap in performance over the OMAP2420.