Not heard anything about that from inside info...
Theres a big demand on the normal boxes due to the current "See speak surf" offer for £26
So I can't see them doing away with it just yet, cheaper to make the normal ones too obviously
Connectivity between portable devices hasn't been mentioned at all, its a bit of a touch and go area due to copyright etc etc.
Remember the HD box is just a glorified sky+ box with a better processor to output higher resolutions.
(Why do you think they pulled the Sky+ 160 from circulation.... cos the HD box has 160gb of storage... its a marketing ploy, they could've used all 300gb from the hd box, but it gives them a cheaper upgrade route, instead of dishing out new boxes)