Here's one for the learned analysts who are sure Sunnis will never work with Shi'ites, and vice versa. "Hamas says will unite with Iran if Israel attacks," from [1] Ynet News, December 15 (thanks to Alexandre):

Hamas politburo chief Khaled Mashaal said on Tuesday that Islamist militant groups would back Iran if the country was attacked by Israel, Iranian state television reported. "All Islamist militant groups will form a united front with Iran against Israel if it attacks Iran," Mashaal told a news conference in Tehran.

"We are all parts of the same body ... We all should fight against the mutual enemy. But how, the leaders will decide based on our capacities."...