Check out the new version of Gmail Go which, in addition to being light and fast, also has a smart inbox.
Functions:
Organizes messages automatically into different categories, offers an advanced search mode, blocks SPAMs, sends notifications whenever an email arrives in the inbox and is compatible with Outlook, Yahoo Mail, and others with IMAP/POP.
Controls:
The touchscreen interface is very similar to the previous version. It's colorful, intuitive, and well organized.