[cvrk3]

There was a talk about google messenger in this forum earlier also. unfortunately no one could pinpoint the name or any reference. Now that you have told about hello,
i had been to the site. See for yourself what it says:

How does Hello work?

Hello is a new program that lets you connect directly with your friends to share your digital pictures. If you’ve used an instant messenger program before, you’ve already got the idea—Hello is special because it lets you share your pictures along with your messages.

With Hello, you just pick what pictures you want to show off, and click “Send.” That’s it. Hello takes care of all the hard work. And you and your friends can download full resolution, print-quality pictures from each other, while you’re doing more important things, like talking about your pictures.
I can already send pictures with email. Why do I need Hello?

Hello is designed to let you send high-quality pictures instantly and securely over any speed connection, even dialup. With Hello, you can send hundreds of high quality pictures to your friends in just seconds—you can’t do that with email.

When you share pictures with Hello, you get feedback from your friends right away. Also, Hello automatically encrypts all your pictures and chat before sending, so it’s safer and more secure than email.
How is Hello different from a website?

Websites are great when you want to show your pictures to the whole world. But it can take hours to put a new gallery online; after you pick your favorites, edit, resize, and upload them, you still have to sit around and wait for someone to come and see them. And how would you know if anyone did?

When you use Hello to share pictures, they arrive on your friend’s screen immediately, without the hassle of uploading them to a public website. Your friends can download print quality copies of their favorite pictures to print right at home, which most “picture sharing” websites won’t let you do.

With Hello’s file sharing technology, they only have to download high quality versions of the ones they really like. Everything else comes in at a smaller size, optimized for viewing on-screen

for further reading see:
http://www.hello.com/how_it_works.php