One of the hottest requests for the highly popular Minecraft: Pocket Edition has been the inclusion of a Survival Mode, and now it's confirmed! While no specific date has been set, Mojang did indeed confirm that Survival Mode would be next on the development list for the hit portable game. Currently, Pocket Edition features a game mode which closely resembles Minecraft Classic, an early-development version which was the foundation of Minecraft (and later, Creative Mode in the full release).
The earliest version is confirmed for Xperia Play, and will be optimized for the controls and screen-space provided by the popular hand-held device. While no explicit confirmation was given for other platforms, it remains a strong possibility. Be sure to check here for the official release date of Pocket Edition's Survival Mode, right here on the Minecraft Forum!