iTUNES CHARTS: Magna Carta Holy Grail is now out in general release, but the event album has sat at the top of the iTunes album chart since it went up for pre-order last week at $12.99. Interestingly, the album has yet to appear on the slowcase at the top of the store’s main homepage, the music homepage or the Hip-Hop/Rap homepage. The only evidence of its existence in the store is by way of a tile on the three pages. Could the lack of love be in retaliation for the Samsung deal? Apple brass wouldn’t stoop so low, now would they? (7/9a)