Blizzard just announced some quite major currency changes that will be happening with the release of Patch 4.0.1. The major points are as follows:

Emblems of Triumph and Emblems of Frost become Justice Points. All other emblems and badges are converted into gold, including BC-level badges. All PvP currencies (current Honor Points, Arena Points, Marks of Honor, Stone Keeper's Shards, etc.) will become the new Honor Points. While there is a cap on new currencies in Cataclysm, that cap is being ignored for the purpose of the initial conversion. You just won't be able to earn anything beyond the cap if you're over it initially. This will then change shortly before Cataclysm is released, cutting off all currencies to the hard cap, with excess points being converted to gold. Remember that the new Cataclysm currencies are:
Justice Points Low-tier, easy-to-get PvE points that will buy gear (like Emblems of Triumph are now) Valor Points High-tier, harder-to-get PvE points that will buy gear (like Emblems of Frost are now) Honor Points Low-tier, easy-to-get PvP points that will buy PvP gear (like normal Honor Points are now) Conquest Points High-tier, harder-to-get PvP points that will buy PvP gear (like Arena Points are now) The exact math for the conversion rates will be posted tomorrow afternoon. We'll let you know as soon as that information is available.

After the break, the full Blizzard statement on the upcoming Cataclysm currency changes.

FFXIV Power Level                                       FFXIV Gil                                       Buy FFXIV Gil