I'm happy to say that I've seen loads of people in purple today at work, even though I haven't heard anyone there mention anything about Spirit Day or other QUILTBAG issues.
I haven't read anything about it in any of the major news sites I frequent, though, and that's been disappointing. But that's why I like getting my news from many different sources, including aggregates of various and sundry interesting links like yours, rm - there's bound to be something important and/or thought-provoking that the others have missed out on.