Looks like the upcoming PS3 port of Little Big Planet for the PSP won’t be getting multi-player.. There isn’t enough room / processing power for it.
“The one thing we’ve lost is multiplayer,” Media Molecule’s Mark Green wsaid. “You’ve got full physics systems, you got full create mode, you’ve got all the aspects of LittleBigPlanet – you can upload, download, ad-hoc share with people – but we haven’t got multiplayer”.
“It’s a trade-off”, he elaborates. “The system is physically capable of doing multiplayer, but perhaps not with the full physics system. On the technical side of things you lose a third of the processing power or a third of the system memory just to do multiplayer at all. With those limitations we couldn’t achieve it.”
Source: Eurogamer via Kotaku