I think it hasn't been reported yet, but Google Profiles now show up in Gmail, under the photo (in the Contacts Manager). It's only a link to the profile, not a real integration.

I wish friends in Gmail would be able to share information (phone number, email and postal addresses...) so that we wouldn't have to update them manually, and leave Facebook!

i wish the same thing, it would be awesome if each contact was filled automaticly by profile

Yes, I completely agree with this. It would make Google more social too.

I'm not seeing it on my account. Does anyone have a screenshot?

Here it is:

http://img82.imageshack.us/img82/1531/publicprofilecx1.png

I enabled the iGoogle Developper Sandbox (with iGoogle Friends Manager).

[Image URL fixed – Tony]

Is there a privacy boundry on this? Am I correct in surmising that if you have sufficient communication with someone you will show up in their Google Chat and that by virtue of this profile development anyone to whom you send an email will also have access to your profile?

I don't think that is entirely true Jacques. Which is why Google have made some changes to their contacts system recently. Like not auto adding contacts to 'My Contacts' etc...