I admire Google's ability to provide so many specialized views to GMail. There's one for the Android application (which, realistically, just syncs information and store it locally for display), one for the iPhone/Android in a browser, one for desktop Browsers (+ basic HTML), one for mobile (non-awesome) browsers (+ basic HTML), now one for the iPad, and of course POP3 / IMAP for use with native mail clients.
They've really covered all the bases here.