Just this week bought a HUMAX HDR-1000T and wifi dongle. Setting up the HDR was easy, but the dongle is a different matter. Repeated attempts to connect failed so I resorted to calling the help line, where a very helpful person told me that my wifi password might be too long(!) (at 9 characters). He said that the dongle and associated software only supports a maximum of 8 characters. Changed my wifi password to be 8 characters and then it successfully connected.
Once connected have only tried iPlayer, Twitter and YouTube and all worked very well. Have not yet tried streaming content from other devices on my home network.