is it possible to make gmail video chat on htc desire s ?

[danishbacker]

I'm planning to buy a smartphone soon
my current phone is Nokia E51 and I likehtc desire s
htc mozart 7
iphone 4
nokia c7

My primary need arebasic phone functions
video chat using wifi or mobile internet (not 3g)
music
making apps (to get familiar with app market etc)
good battery backup
phone reliabilty
ease of use

thats all :)
Thanks in advance