A downside to the SPV is that you're not allowed to install non signed applications. According to Microsoft, it was Orange that decided to not allow people to install their own applications. People have worked out ways around this but it could be stopped in a later firmware revision. I think the main workaround was to use ActiveSync to overwrite a specific configuration file on the SPV during power up when all of the protection mechanisms haven't been started up yet. Microsoft could probably make ActiveSync start up later during initialisation to fix this particular bug.

- Trevor