When I wrote my book on the PSP, one thing I learned was to keep System Software version 1.5 permanently installed on my handheld entertainment device. No upgrades for me. If, on the other hand, your PSP lacks this vintage system software, then you might want to upgrade to the new version 3.80. Released on December 18, 2007, the two most noteworthy features that version 3.80 gives your PSP are the inclusion of Internet Radio and a newly revised theme package (oddly-named, version If you can live without these “extras” and your PSP has System Software version 1.5, then you should forgo the upgrade and continue to enjoy the pleasures of homebrew gaming or Mac OS 7 via Basilisk II.—Dave Prochnow