Constraint on date

hi yaw
Am tring to access the link to the google group above but am getting this error
"This group either doesn't exist, or you don't have permission to access it. If you're sure this group exists, contact the Owner of the group and ask them to give you access."
And on the restrictio to todays date, do i have to write it as >=date('today()')
or i can just write it as just today()

Thanks
Fula