With shut down and prosecution of Liberty Reserve; authorities in US have clearly declared war on virtual and crypto currencies like bitcoin, litecoin and PPcoin.
Most of the e-commerce carts like Opencart, Magento, Prestashop have bitcoin payment plugins which will allow a merchant to accept bitcoin or litecoin as payment through payment gateway providers like bitpay.com.
However to accept or not to accept crypto currencies as payments is a matter of judgment. As the things stand crypto currencies sit between gray-zone of legal and illegal.
With shut down and prosecution of Liberty Reserve; authorities in US have clearly declared war on virtual and crypto currencies like bitcoin, litecoin and PPcoin.
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Here is a presentation on understanding crypto currencies like bitcoin.
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http://www.businessinsider.com/presentation-what-is-bitcoin-2013-3#in-theory-no-one-controls-it-and-you-can-also-take-it-anywhere-since-its-just-code-10
Most of the e-commerce carts like Opencart, Magento, Prestashop have bitcoin payment plugins which will allow a merchant to accept bitcoin or litecoin as payment through payment gateway providers like bitpay.com.
However to accept or not to accept crypto currencies as payments is a matter of judgment. As the things stand crypto currencies sit between gray-zone of legal and illegal.