Rushing to judgement
I agree with Brian: it makes a lot more sense for the one with the better case to wait for the patent office to toss out any duff patents, rather than try to convince a judge to pre-empt their decision. I've always been impressed by Netapp's products, though never close to having the budget to buy one - but ultimately, Sun have made vast contributions to the computing community as a whole over the last two decades, while Netapp have milked a monopoly on a clever filesystem to make vast contributions to their own pockets.
Victory for Sun means we all get the benefits of a state-of-the-art filesystem as open source; victory for Netapp probably means we still get those benefits, but Sun will have to hand over a pile of cash first, just to get permission to keep using software Sun developed independently. It's like the SCO shakedown, only without even the pretence that Sun actually ever took anything from Netapp!
(As you can probably tell, I'm no fan of the concept of software patents.)