Comment: They are talking about having to pay 99 USD. (Score 4, Informative) 767
Microsoft will be offering signing services through their sysdev portal. It's not entirely free (there's a one-off $99 fee to gain access), but it's cheaper than any realistic alternative would have been. It ensures compatibility with as wide a range of hardware as possible and it avoids Fedora having any special privileges over other Linux distributions. If there are better options then we haven't found them. So, in all probability, this is the approach we'll take. Our first stage bootloader will be signed with a Microsoft key.