Well. Google does it again! (I love these guys.....GMailGoogle MapsGoogle Earth Google Mars.....)After rumors and speculations about whether Google will enter the IM arena, they finally done it with release of Google Talk.
All you need is Google, actually and Google account id. You can mail me if you want one. Here are some screenshots from Google page
And the download size is less, neglible onyl 900k So try it out Google Talk