I contacted Expressvu regarding WHEN for the 6141. Here is the response
Thank you for your email inquiry dated 10/13/08. My name is Santanu XXXXXXXX EX3XXXX and I am pleased to assist you.
I understand that you would like to know about the capability to support the external hard drive with your 6141 HD receiver. I will definitely assist you in this regard.
I would like to inform you that you would not be able to add an external hard drive with your 6141 HD receiver. It can only be added with the
9242 HD PVR. I would also like to provide you the detail about the External Hard Drive.