The only issue is that it’s a web-based feature so using it while you’re surfing the net might be a bit of a chore switching between screens. Even though the reports say that this version is going have a similar if not the same feel as your PC version with the capability to handle multiple conversations and alike, the window that has the GTalk version running will show the users as unavailable till they return to that page. Hey, it may not be perfect but it’s there.
To use the service go to www.google.com/talk on your iPhone or iPod Touch’s Safari Browser.
This peoples are creating much hype of this products, when it will reach market the reality will come out until the 3G service are lunched there is no use of this so called Iphone, where there is few more grievance that why this phone is so costly in India whereas the same has been priced some 8000 bucks in abroad. 
