Reader Jiang sent us a tip about his new iPhone application (App Store link). It's a realm status application that will track your realm's up and down times straight from Blizzard's page so you can check them anytime on your iPhone. And that in itself isn't that amazing -- there are other apps that will do the same thing, and even some that will do it for free (Jiang's app is $1.99). But Jiang's app will also deliver Push notifications for you, and that's something I haven't seen before in an iPhone app. You can set notifications for multiple realms, and then whenever one goes up or down, you'll get a notification on your iPhone about it.
A few of the other apps are working on implementing Push notifications, so if you're patient, you might be able to get them for cheaper (or even free, though it usually does cost money to run a notification server). But if you absolutely want up-to-the-minute notifications when servers go up and down and are willing to put a few bucks towards a piece of iPhone software, there you go.