Pretty much as I predicted, Beko – the company that’s now owner of the Digifusion name – is not going to produce a firmware update to make the old PVRs use the standard Freeview EPG.
Some owners on Digital Spy are reporting that Beko is offering £70 to owners of some models of PVR, in exchange for the old units, as a gesture of goodwill. The offer depends on the serial number of your unit, and essentially only applies to those sold after Beko acquired the assets of Digifusion.
The Beko contact page is here.
If you want to recap the whole tale, this is a good place to start.