Ok, so for the spoiler,
Now that the mission is complete, I have no more missions available on the radar via letters (i.e. the big R for Roman etc.).
I have completed a few of the retrieving cars for Brucie (since there is nothing else to do) and I have attempted to call everyone in my phonebook (Brucie, Little Jacob, Roman, Dimitri, Faustin, Michele) and no new missions are available.
I have no idea whats going on. I would like to continue the game, but I can't find what to do to trigger the next mission. Any ideas?