It looks like some of the source that appears in GMail may hint at a domain management feature. This means that users who own a domain can have GMail manage their email addresses. Currently, GMail does allow users to send mail and have it look like the email is coming from a different address. This does require verification but a domain management feature would definitely be a nice addition.

Google recently changed their GMail logo with the release of the built-in chat feature. If you didn't notice they also changed the font type of the GMail logo. The new font looks very slick when you compare it side-by-side with the old one.