• Instagram, Netflix, Vine hit by Amazon glitch - 08/25/2013 - http://m.bbc.co.uk/news/technology-23839901
• BlueHost, Hostmonster, Hostgator, JustHost - 08/2013 -  http://mashable.com/2013/08/02/bluehost-down/?utm_campaign=Feed%3A+Mashable+%28Mashable%29&utm_cid=Mash-Prod-RSS-Feedburner-All-Partial&utm_medium=feed&utm_source=feedburner
• Amazon Web Services - encountered 4 major extended outages in 2012 alone: June 14, June 29, October 22, and the most recent, a 18+ hour outage Christmas eve taking out Netflix, Reddit, Instagram, Pinterest, and a slew of other notable sites. 
• Twitter - 02/02/2013 - http://m.bbc.co.uk/news/technology-21304049
• Bank of America - 02/01/13 - http://www.washingtonpost.com/business/technology/bank-of-america-site-down-because-of-technical-issues/2013/02/01/62063910-6cad-11e2-ada0-5ca5fa7ebe79_story.html
• SpamHaus - 03/27/2013 - The largest DDOS attack ever - http://thenextweb.com/insider/2013/03/27/spamhaus-is-battling-a-ddos-described-as-the-biggest-attack-in-history/

Some interesting high profile hacking cases:

• Morningstar Document research - 07/05/2013 - credit cards and personal information breach - http://www.reuters.com/article/2013/07/06/morningstar-securitybreach-idUSL3N0FB2Y320130706
• Prepaid debit card database breach - 05/09/2013 - A worldwide gang of criminals stole a total of $45 million in a matter of hours by hacking their way into a database of prepaid debit cards and then draining cash machines around the globe - http://www.foxnews.com/tech/2013/05/09/atm-hackers-stole-45m-in-21st-century-bank-heist-feds-say/
• JPMorgan Chase, Citigroup, E*Trade, PayPal, etc - 06/2013 - At least $15 million was stolen via online infiltration of 15 financial companies - http://www.dailyfinance.com/on/cybercriminals-hack-banks-15-million-dollars/