http://www.wow.com/2010/09/14/major-cat ... #continued
This is pretty big news. I'm *really* wondering how this is going to affect purchases of current heirloom, triumph and frost items. I'm guessing that, for the meantime, frost gear is actually going to become easier to access since there will no longer be a limit to how fast we can earn it, since current triumph and frost encounters will both provide the new justice points. Personally, I'm not going to buy any more heirlooms, T9 or T10 till we hear what the conversions will be in the next patch.
Arbitrage, kids! Watch for the conversion titles so we can decide when to dump our currencies -- now, in 4.0.1, or in the patch after that.
And just remember, "In Soviet Azeroth, currency converts you!"