Actually, looking at the numbers, I can only see one possibility of a government being formed. No party has enough to go it alone, and the numbers just don't add up for natural coalitions of parties on the same side.
The only way out as far as I can see is for the party that has come first (New Democracy), Pasok (current ruling party, now dropped to14.07%) and a small party made up of former Pasok MPs, the Democratic Left with Fotis Kouvelis to form a coalition. Very shaky, though. If this doesn't take place, I predict further elections in Greece.