Think that's on the demo video that was on the Apple website when it was launched. It should be common knowledge, really!
At least in the v2 firmware we're getting multiple message deletion!I found that out when i had the touch (email), it's very handy. I actually find moving emails in the iphone quicker than i can on a PC browser.
If you go in to the advanced settings you can tell the iPhone to move deleted messages to the "Trash" folder on the server, likewise with "Sent" items.At least in the v2 firmware we're getting multiple message deletion!
It doesn't bother me yet, as I use Exchange through IMAP - and for some reason deleting it on the iPhone doesn't delete it on the server... so I don't bother. I also can't send emails because I can't be bothered configuring SMTP authentication. But come v2 and ActiveSync support, I reckon I'll use email far more.