Echostar is being somewhat tight lipped about assignment plans. But the rumor still has it AMC-15 is a prime candidate for some additional HD content. No solid word has been made on assignments amongst 148, 61.5, 105, or 121. Yes there is a one dish local mandate and this is exactly what it sounds like...one dish for your locals. From my understanding, this does not mean everyone's locals...i.e. L.A. locals may all be moved to 148, NY to 61.5, ad so forth...it will mean no splitting up of a DMA's locals or must carries, example, having some of your locals on 105 and some on 61.5. Again my take on this is that this does not mean the mandate includes premium channel or AT lineups, premiums and/or AT lineups do not need to be on the same dish as locals.
Just my 2 cents,
Jason