Another revision of Sony's handheld will arrive in 2009, via the PSP-4000, Eurogamer.net report today.

According to publisher sources, the new 4000 model will arrive towards the end of next year, with the platform holder said to be planning a full PSP2 later still.

Details on the modified PSP remain scant, although only minor tweaks seem likely if are already planning a true successor. Perhaps some longer battery life is on the cards?

Meanwhile, the same sources purport to reveal that some developers are already working on full PSP2 games - although news on this mammoth piece of is non-existent at present.

We'll bring you all the latest PSP tittle-tattle as we get it.

By Luke Guttridge