Haha, thanks to everyone for their advice and stuff, I've decided to do as liljim says (And NOT just because he's staff...seriously...) and not make a big deal about the whole thing. I'm always honoured when people use my audio in their flashes, and I've even played and really enjoyed the game that my song is in. I don't have anything against the guys that made it, Im sure that they probably overlooked that aspect of the CC licence *cough* and won't do it again in the future.
However, I will send a PM their way just informing them of the situation, and to let them know what should be done next time to keep within the rules. I 100% support flash ads, and think its a great way for authors to gain a little bit of money from their hard work, and the fact that the profit can be split with audio artists is great, just not really worth pushing in this instance.
So sorry guys, no massive e-drama for you this time ='C. If it happens again with a major big-time flash, we can all do the "torch and pitchfork" routine, but for now, Ill just let em off with a wrist/cock-slap and be on my way. As liljim said, they probably wont be making any big $$$ out of it anyways, and I seriously cant be bothered fighting for a couple bucks. Especially considering the sales Ive been making from my CD ^^,
But once again, thanks to everyone who was supportive, and offered their opinions, I honestly would have had no idea what to do otherwise!