There are a lot of interesting angles here (which I need to find the time to write about), and since O2 is an active used of the Mono Project, this is also a great opportunity to work together with them.
The other interesting angle is the funding and how even Mono who is a very popular and widely used project, still doesn't have a clear and easy to execute business model (which (in my view) is one of the current failings of Open Source at the moment)
