North Africa? Tuscany? There are some FUN convoys you can do in the West Med with those territories, although the threat of them is usually more potent than the execution.
First of all, Tuscany and Spain are separated by one sea province, that being Gulf of Lyon. If you've got an army in Spain and a fleet in GoL, you can convoy between them. Usually more useful for France than Italy. Without Tuscany, you would either only be able to convoy to Piedmont, or you'd be able to convoy all the way to Rome. In fact, you'd be able to convoy between Rome and Marseilles.
As for North Africa, the simple fact that it forms part of the Gibraltar strait makes it one of the MOST important spaces on the board. Wanna break out into the Atlantic? You've got three choices: Spain(sc), West Med, or North Africa. Plus, if it weren't there, Italy would be threatening MAO by taking Tunis.
As for convoying from North Africa, a fleet in MAO and NAO gets you to Liverpool. With an Italian Army and two French fleets, you can do this in 1902. I call this opening an Atlanto.
Although you'd probably have a better shot at Clyde than Liverpool.