Yep Safari for Windows was released at WWDC 2007 (~2 weeks before the iPhone went on sale), and I'm sure part of the rationale was for Windows developers to be able to test their web sites with it.
Also note that Google Chrome wasn't released until September 2008, so there was a year+ where Safari was the most prominent WebKit-based browser on Windows.
Also note that Google Chrome wasn't released until September 2008, so there was a year+ where Safari was the most prominent WebKit-based browser on Windows.