A couple notes for us druid-lovers:
* Wall of Thorns is still an uber spell; they didn't change its description at all (for example, to give hit points to the wall, rather than allowing an iron golem to dig a hole in it as quickly as a toddler wielding a rusty knife).
* Giant Vermin now makes sense, but is nerfed: you can affect three centipedes, two spiders, or one scorpion with it. Depending on your level, you get medium-sized creatures (7-9 level), large creatures (10-13 level), huge creatures (14-16 level), or gargantuan creatures (17-20 level) (don't quote me on those exact levels, though). At DM's discretion, you can cast it on other vermin. The creatures' stats are exactly those of the appropriately-sized vermin in the MM - no building new statblocks that kluge together the MM description and a spell's chart. Stil a nice spell, but without the ability to get those sweet giant wasps.
* Summon Nature's Ally, OTOH, is much sweeter. Remember how before, at the level where you got a (for example) tiger, the clerics and wizards were getting a celestial tiger? Remember looking at their templated creatures with envy? Now you get your nontemplated creatures a level earlier in general than they get their templated ones. If you get a tiger with SNA IV, they'll get a celestial tiger with SM V.
* Furthermore, you get fey and other funky critters at earlier levels. Note especially the satyr with pipes available with SNA IV, as well as the unicorn at SNA IV. Sweet! (This has a salubrious effect: given that druids can spontaneously cast summon spells, you can give up any fourth level slot to get a unicorn, thereby gaining three cure light wounds, one cure moderate wound, and a neutralize poison. It's not spontaneous casting of cure spells, but it's a handy substitute).
Daniel
who got his books over lunch and is operating from memory here