I am not sure that argument holds any logical weight. If there are 'lots of people' in the LTC space then that implies market opportunity. It seems you are referring with the temporary nature to the price by being bid up and not the coins themselves. Obviously, it would not make sense to integrate LTC if one thinks it is going to cease to exist tomorrow. With LTC difficulty rapidly rising the indications are that it will not. And if there are 'lots of people' in the LTC space and if the premise is that LTC will continue to exist then the conclusion to follow is whether the expected return on investment justifies the work.

Consequently, the relevant question is how much would it cost to integrate Litecoin or other crypto-chains in general?

Given most of the back-end work for implementation by SD is probably already done because LTC is so similar to BTC then if the integration and maintenance costs are minimal why not roll out additional product channels? Might as well offer as many options as possible for customers to provide earnings for SD shareholders. Especially if doing so would involve minimal costs.

Practically, any LTC, TRC, NMC, FTC, etc. earnings could either be used to cover costs or be converted to BTC at market rates at BTC-e, and soon MtGox for LTC, for dividends. Really seems like a pretty simple decision depending on what the cost of implementation and maintenance would be.

Would also be interesting to see MPEx support a multi-currency order-book (trading SD shares for LTC, NMC, etc.) and dividends (be able to pay dividends via LTC, NMC, etc.).