I don't see any reason why they shouldn't put it up on PSN. It's a big enough game.
 
Are you able download Portable Ops, because that should be even more confimation of that's up. The bigger question I imagine will be if it's released day and date with the physical version.

UGH! I just realized that is exactly why they named it that. So people could say "on the go" and have it mean two things. I hate you Sony marketing team.

I wont lie,
 
I laughed pretty hard at the topic title. "On the GOOOOOOOO?"

Yeah, most new PSP releases are available to play ON THE GO, or so I've heard.

Yep, in fact, I think its already confirmed. I received an email from Sony with the PSP Go and just below it was "New Great Upcoming games Like MGS PW"

Also yes, you can in fact Peace Walk "on the go".
 
It was one of those things that was announced with the game.
 
 Expect it Day and Date when it releases.

Peace Walker was downloadable from the  Japanese PSN Store in day one. I'm sure the US store will have it next week for sure.

It's not in the PSN store right now, does anybody know what time will it be in there? I'm anxious to play it on my GO.

It is totally up. Fun tiems happen now.

Think we will get a PSN version of this? 

Downloaded Peace Walker from the PSN Store last night, the game is fantastic!

still not there LOL