Yes, I have the default email app set up to deliver email from both my work and home accounts. I do not use gmail except for Google Voice, etc. The icon is a yellow piece of paper with the @ symbol coming out of a white envelope.
I did find an app called the K-9 Unread Count Icon, which seems to be what I need, but it says, "This Widget works only with a K9Mail installation!" So I'd have to replace the default email app with the K-9 Mail app? Perhaps that is the only way to get the icon I want.