EverQuest 2 already went free-to-play last year (with the somewhat confusing, browser-based EverQuest 2: Extended), the game is going really free-to-play starting December 6. A post on the game's official site clears things up: The offerings of Extended will be folded into the rest of the title, and membership will be broken down into three tiers: Free, Silver and Gold.
Free members get a handful of races, classes, character slots and other utilities, while Silver members ($5.00 or 500 Station Points per month) get ... well, a handful more. These two tiers also have the option to purchase some items (like races and classes) piecemeal. Gold members ($14.99/mo.) get unrestricted access to everything. Check out this handy rubric if you're still confused by all these precious, precious metals.