With the release of the new firmware which now supports wifi LAN connections, I thought it timely to post this information.
As far as I can ascertain the official Humax dongle is a rebadged Intellinet 150N model 524438.
See the pictures above for a comparison.
These dongles are based on the Ralink RT3070 chipset. (Ralink software is supplied with the Humax dongle).
So, any dongle using the same chipset should work with the T2. If you have one of these lying around then give it a try. You must have the dongle plugged into either USB port and have no ethernet cable connected for the WiFi setup option to be become active in the System Menu.
Please report your successes, or failures in the thread here, for the benefit of others.