The current TFSA interest rate in 2014 for ING Direct Canada appears to be at 1.4% as you can see here.
At the same time, they seem to be offering a promotion until March 31st, 2014 on new deposits where they are giving investors 2.5% until April 30, 2014. Just to be clear as even I was confused at first, essentially the total amount of funds that you put into the account until March 31st qualifies you to earn 2.5% on those funds until April 30, 2014. Afterwards I would assume it reverts back to the standard 1.4% TFSA rate.
Apparently if you are a new client too and deposit at least $100 into the account they will throw in an additional $25 bonus for free. They seem to be going all out in trying to attract new people.