I only found two online banks that have made any increases in their rates in the last week. As I reported last Saturday, UmbrellaBank raised its money market rate from 3.65% to 3.75%.
MyBankingDirect also made a change that I missed until today. It has been offering its 3.75% money market account for a while now, and it still has that rate. The new offering is a 4-month CD with a 4% APY. The initial minimum deposit is $2.5K. This offer was actually before EmigrantDirect's latest increase. I'm not sure exactly when this CD special started. Google cached the page with the offer last Saturday. I think its previous special was a 3.9% APY 9-month CD.
For more information about MyBankingDirect and its $25 signup bonus, refer to this previous post.