I would use GTalk more, if I knew more using it. I think its the only program people haven't flocked to from Google yet. But then again, its not promoted very much unlike Gmail and whatnot.
Bring on the Google Phone though!
I do admit to being more of a Google fan, but its because they actually make things affordable/cheap/free and its not total crap. Along with the fact their advertisements are not intrusive unlike other ones out there.