Hi Vickie,
I'm surprised no one has come back to you!
Android is a "proper" smart-phone OS with a great host of app, excellent web-browsing and like like.
The Nokia App store is growing, have a look here:
http://store.ovi.com/ and select the N8.
As you say, the N8 has a winning camera, but I am unsure how good the browser is.
You won't have a problem with games on either OS really.
Email is fine on both (actually Nokia's mail for exchange is pretty excellent)
As for battery life... well... the definition of a smartphone is pretty much "a phone you charge every evening" so you're going to be up against is generally. If you're taking a lot of video you're going to drain the thing regardless!
Going for a higher powered android phone might be the safe option.
Spare Ed