itemdata_5.0.5.tar.gz --> http://bit.ly/P8MPub
Just like the one on wowuse, the raw downloads from the API are in a subdirectory. I also created a single JSON file containing all the items, which is how I personally consume them in my code.
I hope that Blizzard continues to make more static data available for download. Downloading items, spells, recipes, etc, in bulk would save bandwidth and many thousands of requests (which counts against our valuable download quota!) to the Blizzard servers. The itemdata tarball compressed 285MB into single 12MB file, which is a huge savings in my book :-)
Anyways, happy programming!