This means all PSP owners can now purchase downloadable content, including original PSone titles and full PSP games like Wipeout Pure, straight from their PC without the need of a PS3.
If you've already registered a PlayStation Network account ID on your PS3, there's no need to re-register. Everything is integrated - simply log-on by entering in your account details. Once logged in, you can add funds to your account or view your download history. Enjoy!