Saying Apple open sourced WebKit is a pretty funny way of seeing things.

They've been pretty good stewards though, for a long time.

I don't know how much of it is lip-service, but webkit.org talks about using webkit on non-Apple platforms, and webkit-gtk gets discussed on their mailing list.

It feels to me like a truly collaborative open-source project, in a way that's unlike most of what Apple does. Again, I don't know how much of this is an aberration, but I've always been impressed with the whole thing.

Exactly, it was open source before Apple came along. Guess GP didn’t realize that WebKit is a fork of KHTML from KDE which was LGPL licensed (if memory serves).

WebKit was forked from the LGPL KHTML. Unless Apple wanted to get sued and lose, they needed to release WebKit under the terms of the original code.

And Microsoft has open sourced at lot as well. So? Why should any of them open source everything?