Greek president George Papandreou has thrown in a proverbial "spanner in the works" to the deal, by announcing a referendum on whether Greece should take the deal or not.
http://www.bbc.co.uk/news/business-15533940
Many are now expecting a No vote, and Greece could default/leave the euro. Good news in the short term you say, but was watching the BBC news just and this could lead to banks/investors holding debts for other EU nations in trouble withholding more support and could make things FAR worse.