Over at NPR's A Blog Supreme, there's a decent tribute to Russell as well as a video from jazz guy Brett Primrack.
All About Jazz has a very detailed obituary on Russell, and you would do well to check out the man's own web page, as well as his Wikipedia entry.
Many years ago, I finally bought Ezz-thetics after my friends at WDNA kept telling me about Russell. Although here and there I'd heard the name and seen a writing credit ("Cubano Be/Cubano Bop"), I suppose that because he lacked the star power of Miles or Coltrane, I remained plainly ignorant of how important and interesting Russell's work was. I was truly blown away by the album's third track, "The Lydiot," and always made a point of playing something from George Russell every few weeks. I had joined that club, I suppose. I invite you to do the same.