By going to the app menu bar, you select delete, and it lets you select a list of items to delete, and then selecting the delete button at the top of the window..erm... panel.

What about the dependence on the PC for email deletion from the server? I'm sick of checking my email twice, once on NM and another via the browser based clients of my various email services. Is this how Nokia plans to continue gong forward? Because if so, I'm going to abandon NM. I get too many emails, and the N900 has me days behind on work and communications.