Free-access Sensors Journal published a paper proposing a very fast CCD sensor. The proposed CCD uses in-pixel 100-200 memory storage cells to achieve up to 100Mfps speed and is able to accumulate the signal to improve SNR:
Etoh, Takeharu Goji; Son, Dao Vu Truong; Akino, Toshiaki Koike; Akino, Toshiro; Nishi, Kenji; Kureta, Masatoshi; Arai, Masatoshi. 2010. "Ultra-High-Speed Image Signal Accumulation Sensor." Sensors 10, no. 4: 4100-4113.
(via Electrones and Holes blog)