It's worth noting that Apple's chief compiler architect is Chris Lattner, who started LLVM as part of his Master's Thesis. I think "playing nice" has more to do with hiring the founder and lead of the project than with any Apple policy.<p>Although, yes, I found it odd that Gruber implied it was Apple's technology.<p>edit: Lattner's page with publications and projects: <a href="http://www.nondot.org/sabre/" rel="nofollow">http://www.nondot.org/sabre/</a>