Oddly enough the blog post you linked to for Kevin Peterson is now gone.
Well iOS4.1 is out now so maybe we will see something soon.
This just hit Twitter:
Junos Pulse for iOS NOW AVAILABLE on the AppStore! Go get it folks!
Pulse needs iOS4.1 or later - currently not available for the iPad. iOS 4.2 is allegedly scheduled for November for the iPad, so I'm guessing that'll be when you can get it for the iPad.
Find Junos Pulse on the Apple Store on your browser, click it through to your iTunes, install from there. It is the iPhone version, but works fine.