The developers have been communicative to an unprecedented extent (for them) during the final phases of Wrath of the Lich King's development, but several classes and specs still have concerns. One of those is Feral Druids. We've been set up to tank as well as anyone, and DPS as well as most (not with the same spec, but dual specs should make this easy to handle). However, we still have some obvious weak points. For instance, take mana in PvP. Our class's defining feature is our ability to shift between forms, but if we have a puny mana pool (as most Ferals do), we can't do this very often.
Ghostcrawler has a "Feral Q&A" thread up where he answers several questions that he's noticed people asking around the boards. Unfortunately, we're not necessarily going to like a lot of the answers, which (in this blogger's opinion) tend towards "working as intended" and "it's fine, learn to play." To be fair, he gives much more nuanced explanations, but that's the bottom line in most cases. That may be because Feral actually is fine, but I definitely think there are some valid concerns. Protector of the Pack is just goofy the way it is, as well as taking away the fun of being super-durable while out soloing. Swipe should really be 360°; every single other tank class has a 360° AoE, and we don't really have anything to compensate. And don't get me started about feral form customization (which GC says is coming eventually, but they've been saying that for years).