MS Windows with Java...
by Steve Anglin
Related link: http://news.com.com/2100-1001-980886.html?tag=fd_top
According to CNET News.com: "A federal judge on Wednesday ordered Microsoft to begin shipping Sun Microsystems' Java with the Windows operating system within 120 days, after the companies fought over implementing a ruling he made last month."
If this isn't proof that developers should be open to developing both Java and .NET-based applications for Windows, Linux, BSD and other OS, then I don't know what is.