Also, the Hero can run a number of apps at the same time.
This is really over-rated. I've got a Hero now, and an iPhone... and a Palm Treo Pro for work, and the wife just got a Pre and got rid of a Mogul.
The iPhone closes each app as you go back to the home screen, and re-launches the app when you open it again. Not really a huge deal because all of the apps launch fast enough, even on the 3G, that they never really seem "closed." The only exception to this is 3D games, which take a while to load.
It's true that the Hero can have multiple things open at the same time - but this also sucks, because it never closes anything for you. Which means that you have to explicitly hit the Menu button and then Exit an app with the app's exit feature (if it even has one) in order to close the app. If you don't do this, the app stays in memory, chewing up memory and CPU until you download a third party task manager application to close things you're not actually using but the phone leaves running.
Not a big deal at first, but when you use more and more programs, the device starts to get slower, CPU is chewed up and is constantly being utilized for stuff you thought you closed, battery life suffers, etc.
I shouldn't need a separate task manager app to close my programs manually. Not having multiple apps open on the iPhone is considered "bad" by everyone that doesn't have one, but I never saw this as a problem on that phone since a.) even "closed" apps launch so quickly - and I can get to them more quickly in the iPhone UI than on the Android UI and b.) I never needed a task manager program to go in and kill processes manually when my phone started getting slow.
Windows Mobile 5 was like that and it drove me nuts (clicking X to close didn't really CLOSE unless you tap and held it.) Having multiple apps open at the same time is my least favorite feature of my Hero (which doesn't have a chin, btw) and I wish I could turn it off. If I'm in something, like a browser, and I want to go back to the home screen - I should hit the home button and the browser process should end. The only exception to this should be a media player app or something similar so you can listen to music while you do other things on the device (which you could do with the iPhone).
Also, the whole "iSheep" thing was funny on Digg back in 2006. Not so much anymore... at all.