That's great that you are a Nichiren Buddhist. I'm not sure if we have any here yet, but I know that our member Thornbush has been starting topics about many different schools of Buddhism (she's like our forum's gardener planting seeds all over the place). Please feel free to start some threads about your tradition. I'm largely ignorant of the more "devotional" forms of Buddhism like Nichiren and Pure Land, so I'm sure I'll learn something from you.
Right now, Dharmawheel seems to be mostly Vajrayana with a splash of Zen, but I hope that we eventually get members from all the Mahayana traditions here.