Soundwave was the original letter page host. Followed by I think Blaster. Then Grimlock. With Dreadwing being the final host. I've probably got that totally wrong.
I remember having to write a letter for English class once. Being a mad Transformers fan I decided to do it as if I was writing in to Grimlock. Warning him that he needed to be nicer or I'd have to apply my VVH type device to him. Only I didn't have a cool name like Variable Voltage Harness for it. It was something crappy like Dinobot Hurtomoeter. The letter was read out by the English tutor. Not sure if I cringed more rememb