Yeah, I'm also saddened by these remarks. While I have no particular interest in Solaris as an operating system (aside from features like DTrace), Sun has certainly contributed to the community. And they do distribute OpenSolaris under an OSI-approved license.
This is a tasteless and inapprorpriate jab from the Linux Foundation. It's no more attractive coming from Linux people than it is from companies who've made similar jabs about Linux.