The large mining pools are being DDoSed. Therefore their hashrates drop as a percentage of the total hash pool.
Also, as miners cannot connect to pools, they go solo, so the "Other" portion rises significantly as a percentage.
When the pools are back online, the miners will move back, and then you can post about how you're concerned Deepbit is 51% of the pool.
OMG! THE "OTHER" MINERS HAVE MORE THAN 50% OF THE POOL!