The strips of land sound cool, and since that is possible (see waldronates link), you can get away with it. Kinda doubt it would work on an earthlike world in a hard-scifi setting, but hey...

As for number and size of continents, if the planet is geologically active (i.e. plate tectonics) then it will change over time. Or in other words, pick whatever you like and see if you can explain the layout with plates. If yes, you are golden. If not, you can still use them and just fudge the facts...