There was an article in eWeek this week reporting that Sun had plans to use GPL v3 as the open source license for Open Solaris. So I looked at Rich Green's blog the next day and he said "not true." But as I thought about it...I bet they will.
Here's why I think that...first of all, it would make open solaris the leader in the "next phase" of open source licensing, next it looks like the linux kernel will stay GPL2 (from what I read) so open solaris would be the only unix kernel with the same license as all of the FSF GNU products and would give FSF a motivation to put some additional energy behind open solaris, and finally all of this would be interesting to the open source community and they would be more likely to give open solaris (which is a very good OS) a try. Could be a very smart move for Sun.
