I've said this before, but here it is again: Litecoin is really only utilized by a small segment of nerds who are a sub-set of a slightly less small segment of nerds, though the latter is briskly growing to include average investors as articles about Bitcoin begin to saturate mainstream media. Most everybody who knows anything about Bitcoin, even the casual reader of mainstream publications, is aware of MtGox. BTC-E on the other hand -- what's that? When MtGox makes an official announcement of Litecoin and/or Namecoin support, it's going to open up the floodgates and expose a whole new segment of people to the chains and, in theory anyway, bring in a TON of new money. People are going to want to diversify their eCurrency holdings beyond just Bitcoin and MtGox is going to enable them to do that by offering viable alternatives.