Google has released an updated version of Gmail for mobile, the HTML5 webapp to 44 new languages. This new version works for iPhones running iOS 2.2.1 and above, and all versions of Android. Go to gmail.com in the browser of your iPhone or Android-powered device to try it out.
If your phone's default language is one of those listed below, go to gmail.com in your phone's browser and the new interface will appear in your language automatically. You'll get a bunch of new goodies including offline support, smart links (titles will appear in links for Google Maps, YouTube and Google Docs), the ability to add and remove labels, layout improvements and more--in addition to the existing features like starring, better threaded conversations and search.