Yaroze -> only for other Yaroze owners
PS2Linux -> Only for other PS2Linux users
PS3 OtherOS -> shall not speak of this atrocity
Vita -> I looked into this, it was closer to what it should be but I still found their TOS and approval process to be overly restrictive.
I really think the first true example of this was on the XBox 360 IndieGames marketplace, the threshold for participation was restrictive but totally doable for almost any developer. it's a real shame they seem to be dumping it.
No, PlayStation Suite does not run on PSP or PS3. It runs on the PlayStation Vita and a very small subset of Android phones/tablets (not even 'All Sony Phones', unfortunately)
Original PS -> Yaroze
PS2 -> PS2Linux with full hardware access, except for some professional APIs.
PS3 -> Here they went downhill with the graphics crippled OtherOS, while removing it altogether afterwards
PSP Vita -> PlayStation Suite
So although they are a bit schizophrenic in supporting vs attacking indies, the company does indeed have a long history already in doing it.