This may be old but I just found it and think it's great. You can add icons for web pages to home screen from safari. A lot of site that are already to setup to have a mobile version show up looking like you got it from the app store. Example www.boingboing.net
Just added an event into my calendar, on my phone, and noticed an option that says invite. Added someone's name and it sent them a notification. Unless I had missed it before, thought this was pretty slick.
Just noticed in the iPod app you can pretty much delete any album/song from w/in the app, pretty much just swipe like you do emails/texts and press the red "delete" button. (I didn't delete one cause I want all the songs on there)