Using the PlayStation Store for PC for PSP Downloads

Sony PSP Media Go for PSP is a free PC program that manages content, syncs it to new content and easily downloads it from the PlayStation Store for.

A Guide to the Sony PSP (Playstation Portable)

PlayStation Portable / Useful Notes - TV Tropes

Handheld Addict: PSP games on Vita

Digital download comics coming to PSP in Japan – Destructoid

PSP 3000 Limited Edition Assassin's Creed: Bloodlines Entertainment Pack- White : Video Games

TGS 08: Future Sony Japan PSP titles to be digital, new Store coming next week – Destructoid

New Playstation Store and changes coming Oct 19th! : r/PS5

Downloading (purchasing) products

All PS1/PSP games are now downloadable on the PSVita - Hackinformer

Free PSP Media Manager 3.0 now available for PC – Destructoid

UPDATE: All-new PlayStation Plus launches in June with 700+ games and more value than ever – PlayStation.Blog

Best PSP Games to Download Before the Vita PlayStation Store Closes