Brando is offering a hard cover for the PSP which includes a joystick atop the d-pad. It looks rather severe but will certainly succeed at keeping your wayward drool from washing into the PSP during Zone races of Wipeout Pure. Available for $12 through Brando, plus shipping. Console point sells similar screens from their very Firefox-unfriendly website, as well, and for cheaper.
Catalog Page ($12, plus shipping) [Brando via I4U]
Catalog Page ($5-$12, in stock) [ConsolePoint]
