It can go wherever they want, even to mobile... i don't care where it will go, how much profit it will generate... as long as i'll get to play it on my PS3 i'm fine.

 Bundling will sell tons of the game, although I think Uncharted should be bundled first

 No, but that is different because that was an average game to begin with, and was not a system seller at all.

I don't think there is any point in adressing these rumours, as they are never going to stop until about a year after release. Nobody is going to trust the dev or publisher, because they are probably under contract to deny any rumours about the non-exclusivity of this game until a certain period after launch, but if M$ were to announce it, I would expect an announcement at TGS

I say at least a 13.27 million PS3 user base by release. I'm pretty sure 7% of that (1mil) will buy the game.

Obviously I don't compare this game to MGS. I'd like to point meaning of the hype. Capcom went really aggressive with this game. 1,36 million as for the new ip is pretty impressive. I doubt PS3 port of this game will sell 200k in US. Games need hype.

Sony and Konami will go with everything they have this June. The sales will follow. One year later we would have just a silent start of X360 version. It would sell good but nowhere close to PS3's version.

X360 has in America alone a userbase bigger than the PS3 worldwide. So yes, a X360-version of the game could make relevant sales on the X360 as well. The later release will be much more of a problem, as you explained. So if Konami will make a X360-version we will know few month after the PS3-release.

Halo 3 is a different kettle of fish. Halo 2 sold in excess of 8 million units on an install base of just ~24 million; a Nintendo-esque attatch rate of 0.33. MGS3 sold around 7 million copies off an install base of 120 million (smaller at the time to be fair), but we are genuinely talking about an attatch rate in the range of 0.1 to 0.14 - far far smaller. MGS3 was significantly worse because it only hit 3 million off at least 100 million install base (0.033 range). Now things don't translate exactly to this gen because the hardcore make up a larger fraction of PS3 than they did PS2, and hardcore have a greater affinity for MGS than the general PS2 public, but the kind of fan-love MGS experiences is clearly FAR smaller than the fan love for Halo, and as such making up the numbers may be very difficult. 

Like I said, it also depends what Konami meant by 'day one' because Halo launched in the US where the bulk of it's sales are made, while launch specifics of MGS4 are undetermined. If they meant, say 1 million on day one in a Japan-first launch, then clearly this is an impossiblity. If it was a US launch, then maaaaybbbeee, but probably impossible. If they meant everywhere, then it's achievable, but like I said, very difficult. Also note Konami would never launch Europe first despite Europe's affinity for PS and MGS. Everyone hates us.

Actually, after waiting, what, 3 years for the game, Capcom announced a PS2 port a mere 3 months BEFORE its release. Had they not announced it until after release, which sabbotaged their own game launch, I'm sure GC sales would have been higher. Because PS2 gamers had to wait an appaling 6 months (note - sarcasm) they got extra missions and an extra character. Of course it ended up selling 2X as well on a system with 6X the install base.

-Bastards

If there is a 360 port for MGS4, there is no way that Konami would confirm it before the launch of the PS3 game. It would hurt the sales of the game. So, no matter what rumor you hear, just expect that if Konami is asked, they are going to say "No". It just makes bad business sense for them to do otherwise even if they do not have a financial agreement with Sony.