Java Gmail client is a new application introduced from Google by means of which you can read your Gmail in an interface similar to the desktop experience.
Gmail's WAP site is also still available for users who cannot or do not wish to run Java applications. Application is available for free from Google though data charges still apply. There has been only positive appraisal of the application till now. Sprint Nextel announced that a download link for the Gmail application will be placed on their PCS Vision deck.
Google recently purchased YouTube thus its CEO Chad Hurley stated that he expects YouTube to be available to mobile users.