If you often send emails to multiple recipients, a new feature in Gmail Labs will now help you to ensure that you don't inadvertently forget a recipient you typically include in your group emails. After you activate it, this new feature, "Suggest more Recipients," kicks in after you add at least two recipients to your message. If you, for example, usually send out a message to your mom, dad, sister and brother together, Gmail will suggest that you add both your sister and brother to the list of recipients after you type in your mother's and father's address.
In our short tests, the suggestions turned out to be quite useful, and we assume that Gmail will learn to detect more groups over time.
At this point, Gmail Labs features close to 50 'experiments,' and Google is clearly making good use of Gmail Labs to incubate interesting new features. Some, like Superstars, Search Autocomplete, Inserting Images, or Custom Label Colors should really become part of the default Gmail experience, but in typical Google fashion, it always takes a while before any new feature graduates from beta status.
Of course, Google also wants to keep the default Gmail experience basic, so some of these Labs features might never become part of the default interface.

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These Gmail Labs features are getting more and more useless!
Looks Cool and Helpful for those users, who are fwd mails to a group
This is useful for some people
i like gmail!
I have just spent two hours sending emails to promote our annual cross-country race to all those who signed up with an email address last year. No way to add those email addresses from my inbox to Contacts. And instead they are working on this stuff?! Incredible!
You haven't seen him.That is why you are speaking so.Everything in this article is true.The kid is phenomen.And,that doesn't have anything with his parents.You need just to hear him and everything will be clear.
google will rule the world, one gmail lab feature at a time: http://bit.ly/I9G0K
I love Google, and Gmail too!
But I do n't like this newest feature! Because of using it one Thunderbird! I will not work, hic!
Hm---interesting function. Not sure it will be that useful though.
i like gmail very much because it is fast but it has problems because it is newer than other mail services like yahoo.But it is very useful thanks.