Gmail Browser is a web browser that is dedicated to running Gmail (and Google calendar). It's an enhanced version of WebMail.app. The enhancements are:
- correctly handles attachments
- correctly handles mailto: links if you set it as the default mail program
- printing support
- 'delete all spam' button works
- ability to change homepage
Why? Well, for me, reading email is usually a work activity, while web browsing is mostly play. And so, when I check my email, I easily get distracted by other web sites. Separating Gmail from the rest of the internet helps me concentrate.
An experimental version, available on the web page, uses the latest versions of WebKit for better mail, docs and spreadsheets support (including rich text email composition).