The OMAP3430, actually. The OMAP3440 is 800MHz (versus the OMAP3430's 600MHz) and is quite a bit more power-hungry than the OMAP3430, which would result in severely reduced battery life for devices in the tablet's form-factor. The OMAP3440 is really a UMPC chip. Note: for anybody wondering, OMAP3 is significantly more powerful than OMAP2, so a direct megahertz-to-megahertz comparison (i.e., the OMAP2420's 400MHz versus the OMAP3430's 600MHz) doesn't tell the whole story.