Gmail Labs is great: multiple inboxes, search auto-complete, recipients auto-suggest, sender time zone, inline YouTube/Picasa/Flickr preview
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Gmail Labs is great: multiple inboxes, search auto-complete, recipients auto-suggest, sender time zone, inline YouTube/Picasa/Flickr preview