Nearly, I think you can send up to the smallest denominator which is 1 millionth of a Grin, so 0.000001 grin, the transaction cost would however be something like 0.02 Grin, which is still considerable. The reason why the transaction cost are having this high minimum value is to avoid user from making dust attacks, or overload the mem-pool (blocking real transaction). Now at least they have to pay 0.02 Grin for every transaction.
Although we could use this to obfuscate the transaction graph, Coin-Swap would be a better approach, hopefully we can get a programmer to implement it this year, it is a very promising proposal:
List of Grin problems and their solutions - Open Discussion + Cool Website to compare Grin inflation
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