Source: Cnet

According to Cnet, Sony Computer Entertainment may be planning to bring text media to the PSP.  It appears SCE has filed several trademarks with the Japanese trademark office including “PSP Comics", "PSP Books", "PSP Magazine", "GT-Magazine Mail,", "N.U.M.," "Double Smash", and "Kunoichi Densetsu.". Some of these trademarks resemble game titles such as GT-Magazine Mail (Gran Turismo Possibly?).

SCE Also filed several patents that relate to the Xross Media Bar used in the GUI for the PSP and PSX, including Xhross Media Entertainment, XME, XROME and XHROME.  These trademarks could just be attempts to head off potential trademark conflicts in the future, or it could be a preview of Sony’s next releases.