I joined TMO after N900 so my experience is limited, but from the info we get now, I think the Maemo 5 community model will complement Jolla's business model very very well.

First of all, app store. I don't know whether Jolla has plan for an app store. My guess is no they don't, then the Maemo download and the community QA model would become the unofficial Jolla Store. This was what Apps for Meego initiative intended to be but never became. I really like Maemo 5's QA model, users gets more engagement, developers gets more direct response, and after all OVI QA didn't prove they are more competent than community QA. I think the community should try re-use the infrastructure for Apps for Meego and build on top of that, maybe integrate it into TMO so users can do single signon for both interface. For this initiative, Jolla needs to reveal their plan for the app ecosystem as early as possible and actively collaborate with the community.

The forum (including Wiki) interface is an essential part of to build up followers. The Maemo 5 wiki was a great example for crowd-sourcing support documentation. Being the spiritual successor of Maemo, it only makes sense that Jolla take advantage of the existing M* user base on TMO. I would like to see community council approach Jolla and try selling the idea that TMO can offload support work for Jolla and act as "Jolla Store" + "Jolla Community Support" + "Jolla Developer Forum." For the traction Jolla gets, they can in return partly sponsor the forum or other activities like community device program.