Downloadable skins and texture packs will be available from PlayStation Store soon after release
Mojang today confirmed that Minecraft: PlayStation 3 Edition will be available to download tomorrow, December 17th, in North America, and on December 18th in Europe. Minecraft: PlayStation 3 Edition comes with everything present in other console versions. They are pretty-much identical to play, and will be developed in tandem from now on.
A video is available for your viewing pleasure.