The stolen coins most likely were immediately sold. If that's the case, tracking them would be useless, they are in hands of thousands of people who have nothing to do with the theft.

Bitcoin
Namecoin
Nxt
Dogecoin
Primecoin
Zerocoin (once released)

Just like in every other case when people talk about Bitcoin price - they guessed.

Seems like you misunderstood. I edited my post, maybe it will be more clear.

It's like you said gold isn't more expensive than silver, because you can buy 1g of gold instead of 1 ounce of silver and it will cost the same.

That's nonsense. You can't compare 0.017 BTC with 1 LTC. You should compare 1 BTC with 4 LTC, because there will 4 times more Litecoins mined than Bitcoins in total. Which means there will be around 16 times more 0.017 fractions of Bitcoins than "full" pieces of Litecoins. So yes, Litecoins are cheaper. And no, they aren't pegged, I don't even know where did you get this idea from.

Sounds like legitimate business to me.