This was posted by Tyler Cowen:
Here is part of one summary:
The major boon from the document for Bitcoin is this: users get off lightly. In fact, FINCEN does not intend to touch mere users of virtual currency at all; the document states, “a user who obtains convertible virtual currency and uses it to purchase real or virtual goods or services is not an MSB under FinCEN’s regulations. Such activity, in and of itself, does not fit within the definition of “money transmission services” and therefore is not subject to FinCEN’s registration, reporting, and recordkeeping regulations for MSBs.” The document also offers protection from “prepaid access” laws that regulate gift cards and the like, saying that “a person’s acceptance and/or transmission of convertible virtual currency cannot be characterized as providing or selling prepaid access because prepaid access is limited to real currencies.” Finally, even exchanges are safe from “foreign exchange” regulation, the set of rules governing businesses that offer exchange between two or more national currencies.