1UP -- it's filled with great revelations about MGS4 and Hideo's thoughts on the future (including MGS5).
One thing did pop up in our readthrough: Hideo Kojima is unhappy with the number of people currently playing Metal Gear Online, the multiplayer portion of MGS4. Undoubtedly, the cumbersome Konami ID registration process, which requires players to write down multiple IDs and passwords simply to get into the game, became a significant barrier of entry.
"Honestly, officially, I can't say anything on Konami ID and Game ID. It's a company policy. But frankly speaking, the idea wasn't a very good one. The fact is that Konami's direction was that we create a Game ID and Konami ID for the online components, and now we're seeing that it's not working so well, and we have to think about how to turn it around. It was a concept of an online Konami group thinking, so there's not much I could do at the time."