I know there is a section where you are able to show off your creations. I dont see why your world cant be one of them. Download though, I think thats a little far into the tech world on PS3 right now. Great idea though!
Modifications to the Minecraft: Playstation 3 Edition are against Sony's ToS and therefore against the Minecraft Forum rules. This includes adding, removing, tweaking or hooking into any of the PS3 files. The discussion or facilitation of mods for the PS3 is also not allowed on the forums. This extends to discussing, linking to or distributing map download links, modification software and old Minecraft: Playstation 3 Edition version sharing. If you wish to show off your video/creation, without the download link or promise/implication that the map will be released at a later date, please post in the PS3: Show Your Creation section.
Please do not post maps for download, information on how to download maps, links to any of the same, or anything else that would lead to infractions.