Maybe this has been explored, but I've looked around and not found any info. Anyway, has anybody looked into a possible exploit in the id3 tags of mp3 files? There was a trojan in MacOS X some years ago that caused a buffer overrun by inserting junk data in id3 tags. Forgive me if this has already been explored and/or if it doesn't apply for the PSP, but it appears to me that the built-in media player reads id3 tags, so... Again, sorry if this is a moot point.
EDIT: I'm sorry, this really belongs in Speculation.