Wasn't there mgs comics for the psp?
Yeah, I have a UMD with all of the MGS comics collected on it (with stylish art by our own Ashley Wood).
PSP / Sony also had a Digital Comics app though, with a wide range of comics from Marvel, DC, IDW and even 2000AD available.
It's been defunct for a few years now (all of my previous purchases had to be backed up on a PSP memory stick or they'd have been lost).
It was dead handy for on-the-go comics, before the iPad / Tablet became the ubiquitous option.