DP Review just posted a news article titled “Toshiba shows-off Lytro-style Light Field module for mobiles”, fulfilling a prediction I made in my original Lytro article about a year ago. Details: The 8-megapixel sensor reportedly delivers 2-megapixel images, which is a better ratio than I had hypothesized but that appears to be a case of different design trade-offs according to DP Review.
Read this article: Lytro camera for Toshiba mobile phones.
Addendum, 04 May, 2013
Addendum, 06 December, 2013
Still more cell phone developments: Apple patents a lightfield-type camera for iPhone.