Probably one of the last patch 3.1 post before live (who said next week ?).
All of the Ulduar bosses on MMO Champion, though Algalon and Yogg-Saron loot are not given, they were not tested and their capacities were probably extracted from the patch files.
About Yogg-Saron, if some of you don't know yet, it is completely inspired from Yog-Sothoth, one of the Old Ones from H.P.Lovecraft Cthulhu Mythos. If you don't know his work, I'd advise reading The Colour out of Space, and At the Mountains of Madness. Lovecraft work is sometimes disturbing, but quite unique and he has inspired many authors after him.
Back to wow news, a new build on the PTR, build 9757 on MMO Champion, not much was changed, some bosses a few achievements and a very small number of class skills. Blizzard is close from the end, I'd say.
On another note, they announced that the equipment changing tool won't be in 3.1, it is still too bugged and will be introduced into a later minor patch. Don't delete your Outfiter yet :P
To end these news, MMO Champion also wrote a full list of all new items from the patch 3.1, either Ulduar or Arena, ...etc, go give it a look.