Well the South Korean release of the PSP will be arrive with a few more extras because of how developed the online gaming scene is over there, as well as various online services exclusive for the PSP such as video/audio streaming from selected access points as part of the online service.
A keyboard was shown last year at E3, but then a Sony spokesperson dismissed the idea of a word processor being featured on the PSP. However I don't think this is true. I'm pretty sure the next firmware update will either have new features such as an internet browser and other enhancements, either that or those free small games for the PSP.
I think the future's bright for the PSP