Charlotte finds out about the discovery of the Flight 815 wreckage while in Tunisia (where the polar bear was found). Based on the timeline of events on the island, and the Find 815 ARG the wreckage was found approximately in early December 2004. Why was there a Dharma polar bear in Tunisia, and why did Charlotte seem to recognise the Dharma logo? Both are questions for another time.
What did Charlie have written on his hand?
In “Through the Looking Glass”, as the communication room filled with water Charlie wrote “Not Penny’s Boat” on his hand and pressed it against the window for Desmond to see. Then in “The Beginning of the End”, Charlie appears in a one of Hurley’s hallucinations, but this time when he presses his hand against the glass it says “They Need You.”