Station Cash is an option available from SOE for EverQuest, EverQuest II and Free Realms which allows players to buy Station Cash for real money and use it in-game to purchase exp potions, fluff pets and appearance gear. Any money funded into your Station Cash wallet can be used universally across all three games.
According to Alan "Brenlo" Crosby, SOE Director of Global Community Relations,
The items available from Station Cash will not be tradeable. Ever.source: EQII forums
This service went live with the patch on 12/09/2008.
The following items are available for purchase with Station Cash