About this current case, the Boston bombing, from everything I've heard so far, these three that were arrested sound like they were just some bumbling idiot kids who did not realize the extent of which they were involving themselves. That's what I gather so far anyway. We'll see what other info comes out though.
I'm quite torn on that Fort Hood incident. Although personally, I would probably consider it an act of terror, it would be difficult to actually prove that. I still think that religious motivating factors should be included in the definition.