Patch 4.1 looks likely to drop any week now, so now's a good time to find out what the patch can do for you, gear-wise. The two new dungeons, Zul'Aman and Zul'Gurub, appear to have been completely itemized, so we can probably feel relatively safe in looking at the gear that drops from them. The gear is all ilevel 353, which puts it below raid and valor point gear but above most current heroic dungeon drops. Therefore, casual raiders, non-raiders, and new level 85 death knights will probably find a lot to like in the stuff coming out of this dungeon. Let's take a look at the gear.
For the most part, these will be clear upgrades over your ilevel 346 heroic options, but in cases where there's a better or competitive old heroic option, I will mention it. Note that this information is from the patch 4.1 PTR and may therefore change when the dungeons go live.