1. Google Docs gadget – It previews Google Docs below the chat box. It shows the top five last edited docs.You could click on a doc and it will pop it up in a new window . Built right into your inbox it keeps you up to date with Google Docs. In-case you have created a form and are asking people to fill it but on a single day you forget to check docs, the inbuilt preview would remind you of it.
2.Back to Beta – Adds the super popular BETA tag back to Gmail. We all know how famous Google is for it’s BETA tags. If you loved to be greeted by the familiar BETA text in silver, then just enable this. According to the author, it soothes your soul.Yes it does!
3.Green Robot – It shows how many of your friends are chatting with their android phones and how many are up from their computers. If they are using their Android phone for chatting then their status icon would be the android green robot . This could help you chat more precisely . For example, if you see that your friend is up from his android phone, you could send him shorter messages so that he could cope up with you. This does a pretty good job but sadly their isn’t one for the iPhone. When launched this lab feature was not helpful because hardly people owned an Android phone. But with the Nexus One hitting the roads, this must be enabled.
4.Undo Send – One of the most advanced labs feature yet. If you wanted to send an email to your friend named John but instead sent it to your boss also named John, then only this could help you. You could undo your sent emails. After hitting the send box this lab feature waits for 5-10 secs and if you want you could undo the sent message. I experimented with it a bit and sent obscure messages to my alternate email addresses, before five seconds I hit the undo button and none of my other emails had those mails.
5. Picasa previews in Mail – Preview your Picasa pictures in your mail. You could preview the photos in your mail whenever you receive an email with a Picasa link.