Player's Handbook II
The Player's Handbook II will include Arcane and Divine information. Primal and Psionic are the new power sources highest on the list to be included, but they're not sure how much will fit (source). Primal has since been pretty much confirmed (source).
Scott Rouse says "The license is done but late yesterday we added a bunch of new stuff to the SRD to cover some books coming out next year (like PH2 classes, power sources, and weapons)." (source) When someone complains, he asks "So do you want Psionics now or 12 months from now?" (source)
The PHB2 will include the Sorcerer (source), the Barbarian and Druid (Races & Classes), as well as classes "not unlike the Druid, Barbarian, and Bard" (source).
Mike Mearls discusses the PHB2 on Gamer Radio Zero here. Some highlights: "If there's stuff in the Player's Handbook that you're like, 'hey, where's this class', it's probably going to be in the Player's Handbook 2." Also new classes - a cleric that's a bit more on the spellcaster-y side, a striker that's a "deadly and dangerous" kind of guy. The druid (I think the 3.5 druid, but I'm not sure) is the main example of a primal character, and other primal classes do things that will remind you of the druid, but in their own unique way. He lists the first letters of each class in the PHB2 - D, B, B, W, I, T, S, S (after this correction). He also says "I think only three of those are classes that anyone has ever seen before. I think the other ones are all new classes, completely new to Dungeons & Dragons." However, when asked on his blog how many classes are new he says "Three are completely and utterly new. The rest are either classes or old concepts revisited." (source)
The Bard will be an Arcane Leader (source).
Significant Druid info here.
Elementalists are mentioned in the Dwarf entry in Races & Classes alongside clerics, paladins, fighters, barbarians, rangers, and wizards, so they are likely a planned class.
The Monk is not a Martial Striker, and as of D&D XP they had not seriously started designing the class (source).
The Shaman is mentioned as a class that fills the Leader role (source). Rich Baker mentions it "includes some neat mechanisms for dealing with nature spirits". (source)
It appears the Sorcerer will be an Arcane Controller. Rich Baker mentions thinking hard about "how it could occupy the same role and power source as the wizard but be a different class" (source), and Christopher Perkins mentions Sorcerer as a possibility for members of the Arcane Caste, along with Wizard and Warlock (source).
Significant info on the Sorcerer here.
"At the end of the day, Brandobaris smiles largest at the halfling with
the wildest tales."