Made up of former Nokia employees, Jolla was a product of Nokia’s “Bridge” – the project to relocate employees whose roles at Nokia were eliminated by the decision to move away from MeeGo and from Symbian as a smartphone OS. Nokia has even opened up a number of patents to assist Jolla’s development of a recognizably Nokia-heritaged fork to the long-running mobile Linux project.
(UPDATE: It turns out that the Finnish source of this information may have assumed too much: Nokia has clarified that they were not transferring patents to this or any other Bridge beneficiaries. They may be licensing them, but are not commenting on that. So, it seems like that Jolla MeeGo will build largely on “stock” MeeGo. How much this will impact the user experience is at this point an open question – a lot would depend on the UI experience, which was always going to be Jolla’s own creation.)