MGS4 releasing on June 12, 2008 according to Destination PlayStation. Awaiting Konami confirmation!
To quote the source above: Word from Destination PlayStation, a retailers-only conference for all things PlayStation related, is that Metal Gear Solid 4 is coming to the PlayStation 3 on June 12, 2008.
According to sources there now, the release of Kojima Productions action-stealth game will arrive on a Thursday, oddly enough. Even more interesting is that we're hearing word that Sony will be offering a hardware bundle that features MGS4, an 80GB PlayStation 3 and a DualShock 3 packed-in.
We're checking with Konami for official word on the matter and will update with additional information soon.