Phil, the firmware with the option to remove the logo is already available.
As I stated in a previous response in this thread, it is a 'one-time' only upgrade. By that, I mean that it is based on the current firmware and will remove the logo, but you specifically have to request it through their ticket system, as it is not available to download from their website. It does not have the option to switch it on or off, it just removes it permanently. The problem arises when Nextbase next updates the current firmware, as it will be updating the one that is offered for download from their website, which still has the logo present. If you update the firmware to this newer one, you get the logo back plus whatever other things have changed.
So, for those wanting no logo, you can ask for the specific firmware to do it, but it then means that you can't avail of any new features any future firmware will offer unless you're prepared to get the logo back.