I've looked in the Welcome Back section for the PSP and on the MediaGo store thing and have downloaded one of my free games, but have yet to see where to get or download the 30-day PlayStation Plus subscription. It's not listed there at all, and it's not in my previously downloaded section of my PSP buyers whatever.
Don't tell me to use my PS3 to find it because I don't have one.
Was the PlayStation Plus thing only for PS3 people?
It would have been nice if they said that to begin with. That really stinks.
As stated above, they did announce that PS+ was for PS3s only. Also, as you've noticed, it only appears in the PlayStation Store when logged in from the PS3.