MaxLinear also has a 24 channel chip with FSK control that may be able to function as a DSWM (MxL865) as well as another that has three 24 channel outputs (MxL868) They've announced design wins with Zinwell and Eagle Aspen to use the MxL865, and will be delivering chips to them in Q4 2014.
I figure there's little difference between the needs of Directv for DSWM and other operators for their CSS chips. Directv uses FSK for control, others use DiSEqC. Directv needs sufficient input bandwidth to cover their satellite spectrum, and ideally would want a standardized number of output channels so products are interchangeable. Directv uses one command set, and others use that DiSEqC command set HoTat2 was investigating. Whether there's a lot of overlap between the command formats, or they're completely different, it is a simple matter of programming to support what Directv needs from a DSWM.
So I'm wondering if perhaps Directv created a spec / list of requirements for DSWM and made it available to Entropic and other interested parties, so others were able to include support for DSWM in their CSS chips. This way Directv can benefit from more competition in the cost of DSWM chips, and there would be much larger economies of scale available to those OEMs since their chips would be used all over the world, rather than only by Directv.
If that was the case, we'd have Entropic and NXP (assuming their chip is separate from Entropic's) making a DSWM ASIC specific to Directv's needs, and Broadcom and MaxLinear making worldwide CSS chips that also implement DSWM. The advantage for the Directv-specific product is that it can be made more cheaply for a given process, since it handles exactly the input bandwidth required by Directv and no more. The worldwide products both handle significantly more input bandwidth than Directv has, which would make them larger and therefore more expensive for a given process - but sales volumes would better amortize the cost of designing them on a smaller process, such as the 28nm process Broadcom has used. The process used for MaxLinear isn't mentioned, but the Q4 2014 ship date makes 20nm quite possible.