As of Tuesday's receipts, Dark Knight is up to $333,929,159 US. That puts it at #16 all-time, right behind Spider-Man 3, and just above Forrest Gump. When Wednesday's receipts come in, it should move up to #14, passing Spidey 3 & Finding Nemo, and be just short of The Two Towers.
With it grossing $20 million just from Monday & Tuesday, that's about on par with my original estimate of it doing about $35-$40 million M-Th. Should be at about $350 million going into the weekend, where it'll fall just short of $400 million. It'll hit that by Tuesday next week. $500 million by the end of August.