After Dec. 5th, 2011, ExpressionEngine 1.x will no longer be included as a license option for new purchases. Download access will still be available.

Second, after April 23, 2012, ExpressionEngine 1.x will no longer be publicly supported. Only private and enterprise support contracts will continue to have EE 1.x support.

We at 3 Red Kites will continue to work with existing clients who are on ExpressionEngine 1.x and not currently able to upgrade. If you want help in upgrading, contact us.

Read the official announcement.