An interesting list compiled by Google highlighting their other service besides Search!
Basic info but nicely put with the help of videos. Have a look Things to do with Google.
Video – Audio in Gmail
Also released this week is Voice and Video chat on Google.
But for this to work, one would need to add a plugin found here
I’ve tried it and found it brillaint! Better than Skype! You won’t get the emmos you get on Skype but this is great.
One can also send SMS from Gmail – but as of now it’s only for US users.