If you thought you saw this news before on Phoronix, you did indeed read about it more than one month ago: X.Org Is Now A 501(c)3.
The X.Org Board of Directors confirmed it since early June, but alas they're slow as usual to get anything organized and announced.
As said in that earlier Phoronix posting, "Though if you're hoping the X.Org Foundation as a 501(c)3 will make them better organized and responsible, it sadly doesn't look that way. At the same meeting it was brought up they were late in paying their Delaware taxes, only now are they talking about a $15,000 that Intel evidently promised them two years ago for XDS Toulouse, and a host of other issues. (And heck, they still haven't even sent off a quick e-mail to publicly announce their new non-profit status themselves.) They may be phenomenal developers, but not the best at running an organization." And now added to the list, it took them more than a month to announce this fundamental change to the foundation's organizational structure.
The X.Org announcement was made on their Wiki.
20 JULY 2012: The X.Org Foundation is pleased to announce that the U.S. Internal Revenue Service has determined that the X.Org Foundation qualifies as a public charity under section 501(c)(3) of the U.S. Internal Revenue Code. This allows for contributions to the Foundation to be considered tax deductible for U.S. taxpayer.