1) If it doesn't have the latest OS you will be able to upgrade over the air.
2) I don't know, did you?
3) I didn't have a Curve, but I had an 8830 and to me the web browsing is a little better but I don't really use my phone to browse the web. 99% of the time I have my MacBook Pro with me and since you can use the Storm or any other BlackBerry device as a wireless modem I opt to just browse the internet using my MacBook Pro with the Storm as a wireless modem.
I just ordered mine too, and although Verizon said they ship by the 17th, the order status says i should receive about 2-3 business days.
I don't want to get my hopes up, but damn i'm excited!
I think you made a good decision. I've had many of Verizon's Blackberries, from the 7250, to the 8830, the 8330, and now the Storm. I'm confident that, if not now, then after a few software updates, the Storm will be the same reliable Blackberry I'm accustomed to. Time will tell!