MythTV and Cox HD Digital TV

[Joe]

Is anyone recording HD from their Cox digital converter box? If so, what 
hardware works for you. I can record the un-encrypted channels, but I 
would like to records from the converter box since there are more HD 
channels there. Also friends keep asking me if Myth will work with 
DirectTV and I think it would be the same setup. I tried the firewire 
port, but I cannot get any data from it.