Click on "Find a Pool" then select "Join a private pool". The pool ID #262585 and the password is "dupool2014".
You can also PM me with your email address and I will send an invitation that has a link you can click.
According to Yahoo the deadline for entering brackets is 1:00 AM ET on March 20. This is earlier that previous years when you could enter brackets anytime before the start of the first games on Thursday.