Few weeks earlier Gmail introduced long awaited Themes feature. Similar to iGoogle, some of the themes are dynamic. Themes change according to weather conditions in your city, time of the day and day of the week and so on.
In case if your trying to find the coolest of these themes, try visiting the below link which has all sorts of possibilities to try out.
http://tutanhamon.com.ua/technovodstvo/gmail_themes/
