That one, Tom, I'll have to disagree with. Most of our group found Tome and Blood the most worthwhile book out of the bunch of splatbooks - that, followed closely by Masters of the Wild.
As for the Polymorph self errata, it's under "Player's Handbook Clarifications, version 2.0" on page 5, on the Player's Handbook errata page of Wizards' web site. Actually, it's for Polymorph Other, but if it applies to one, it applies to the other, by the wording of Polymorph Self. So, it IS there. However, they STILL don't make it clear enough. They SHOULD have just said, "you keep your extraordinary abilities, but no supernatural or spell-like ones." Instead, they have to get very technical about what is and is not allowed, which doesn't help much.