Faster than you can say "que lo pariö!" a denial has been circulated by FIDE. (Very tight circulation, but hey, this the DD.) They sent out an e-mail saying that the report at ChessBase is wrong and that the Kasparov-Ponomariov match has not been postponed. Funny, because the main organizer, Argentine GM Miguel Quinteros, has continued saying that it IS postponed!
From what Quinteros says, FIDE prez Ilyumzhinov and Argentine prez Duhalde met and discussed the lack of funds for a June match two weeks ago. So maybe Ilyumzhinov has a few aces (or bags of rubles) up his sleeve. Might he fund a Buenos Aires match himself or go with another site to keep things on schedule? It will probably take a few days for this to shake out.
The bottom line: the Argentine organizers are saying it's postponed, FIDE is saying it is not postponed. This may mean that FIDE is still planning on June, but not in Buenos Aires. (Then they would both be correct, in a way...)