really dumb, but I figure I need t know.

Ok... let's assume that I have ONE solar flare dragon on the field at the beginning of my turn. now, I summon a second. does the fact that there is another pyro-type trigger, even though it's another SFD? and if that's the case, and it DOES trigger, and these are the only two monsters I have on the field, does this mean my opponent cannot attack?

~From yugioh-card.com

You are correct, having 2 face up solar flare dragons on your side of the field will prevent your opponent from attacking.

AAAWESOOOOOOOME!

times like this make me wish I had a third SFD...