WoW Insider has a post up with the downloaded patch notes from Patch 3.0.2. (These are the notes that downloaded with the client patch this morning.) The current patch notes page on the World of Warcraft site hasn’t been updated yet (as I type this) — it’s still showing Patch 2.4.3.
However! I’m not going to be posting the Patch 3.0 patch notes myself — no, not even the hunter bits — because frankly the downloaded notes are a mess. It’s hard for me to judge the skill-specific notes, but the pet-related items are in random order, lacking important details, and entirely confusing.
If you want to know all the pet changes in this patch, I suggest you start with the summary on Petopia instead. (But of course I would suggest that! *grin*)
I’m very much hoping that Blizzard has an updated set of patch notes to post on their site sometime today. (And who knows — there may be a poor Community person frantically confirming, clarifying and revising even as we speak! Certainly that’s how most MMO teams handle patch notes.)
 Blizzard’s current patch notes page has now been updated. These notes don’t look any more recent than the downloaded ones, though.
I especially like notes like: “Freezing Trap now breaks on damage.” That’s just utterly confusing if you don’t have the beta context.