Yes. This will be possible with NV2. It is on the list of the coming features to NV2 (see the NewViews 2.08 Manual > Appendix A > What’s Coming > Mail-Merge and E-mail).
It will not be introduced in the next updated version with is 2.09 but should be ready in early 2007.
For now, you can Print Invoices and set the destination to a file and then email that file as an attachment.