Hello, I didn't have enough material for a handbook, but here are some things I have noticed about the Barbarian.
Feats you can take at level 1:
Mad Foam Rager- You can delay the effect of one attack, spell, or effect once any time you rage or frenzy. In other words, if you go FB, you can delay a death effect for about a round, and if you aren't a FB, you still could benefit from a delayed healing/whatever.
Reckless Rage- You gain an extra +2 to your Str/Con while raging, for the penalty of another -2 to AC. It is not to shabby, IMHO.
Blazing/Frozen Berserker- Gives either the Fire or Cold subtype while raging; so if you are up against creatures that deal damage of that type (fire/cold) a lot, take the corresponding feat, and hide in the warm/cool embrace of your anger.
Instantaneous Rage- Rage at any time? I am so there. It's a free action too.
Extra/Extend Rage- You get more bang for your angry buck. What can I say? Alright, Extra Rage get's you more Rage, so it's better than Extend Rage, but only because they changed Extend Rage so that you can't take it more than once.
Intimidating Rage- You get so pissed you can smell the urine now. Oh wait, that's the guy over there who failed his save against the fear effect caused by your RAGE.
Destructive Rage- +8 on Strength checks to destroy doors and the like? Be still my beating heart, this is awful unless you are the party's sunderhound.
(Half Orcs only) Channeled Rage- Congrats, you can exchange a rage use to give yourself your Strength bonus to Will Saves. I have no opinion on this one.
And here are some idle thoughts.
-Alrighty, Bear Warrior (BW) has that Bear Form thingy, that let's them become a bear. It's actually kind of cool. The other cool thing about them is that that ability counts as wildshape for the purpose of getting into Warshaper. If it is in fact an equivalent, wouldn't that mean you could use BW to get Wild Feats? If that is the case, then we could have a Raging, Huge Sized Dire Bear on our hands. Which seriously would be sweet.
-When mentioning feats that a raging Barbarian can use, they neglected to talk at all bout whether or not you could use psionic feats, and this has never been clarified, to my knowledge. A Deep-Impact using Frenzied Berserker (if he can't focus, then he always has that psicrystal to do it for him, with the cost of 2 feats) makes me scared.
So, any thoughts on your part? I haven't really taken a look at alternate class features, so that could be next...