I recently posted my review of the Webcube from ThreeUK. I also mentioned the Mifi which I have also reviewed in the past, if you like you can read those reviews with the following links : Webcube and Mifi (E586).
I have had a couple of emails from people asking the best way to update their mifi to the latest software as they are having trouble with using them with their console.
To save myself some effort on writing out instructions etc, I would recommend you follow this link which contains instructions from ThreeUK. There is also a link for Mac users as well.
I am always interested in your thoughts so if you have any comments or feedback then please feel free to add any comments, or you can mail me here.