They probably used the name "Transformers" since "Tranny" didn't work out as well.I thought starscream was a decepticon (Like a lolicon, but they prefer to get themselves off using deception instead of loli's. That's why they like to be robots in disguise.), but that looks sort of like an autobot symbol on him.
Never heard of it.
By that, you mean Petit Roid? Because that's what that pic is from. I have it somewhere on my hard drive. All three volumes, in fact.
I'm very upset to say it seems I am not currently in possession of the T-link doujin. But if someone else is, please post it in the hentai doujins thread!