Given the need for AD compatible directory services, I am sure that both IBM and Novell's recent announcements will see a LOT of active work from those companies. And they both know how to make solid software. I'm willing to bet that before year's end, we'll see two very solid, very AD compatible products for Linux.

In fact I think they'll turn around Microsoft's embrace & extend strategy by making a better AD than AD. Though admittedly, that won't be difficult since AD is basically crap.