GoldenBuddha:
File --> New Window
In the new window open M2 (the mail app)
You have 2 seperate windows... yes they'll both say Opera, but one will have a mail icon

(no this does not open it in a new tab, it will be a seperate window on your task bar.. its called a "Choice" which IE gives you none

)
tmx:
Mouse Gestures is the nectar of the gods!!! Its SOOOOOOOOO much faster to browse without clicking the stinkin' back button all the time. Just hold your right mouse button and swing LEFT... OR even easier..
Hold right mouse button down, and click the left button for back.... and hold left mouse button and click the right to go forward.. EASY!
In Opera keyboard control is awesome, you can almost surf entire site with just the keyboard once you learn your way around
I'm getting used to the mail client, and I do like
The really nice thing about Opera is almost Everything is customizable! Skins, keyboard controls.. you can even re-create the mouse gestures if you want!
IE = Obsolete Crusty Junk