" GTalk already works with open-source instant messaging apps such as the Jabber client. Why don’t Yahoo and Microsoft support open-source too? Because they likely see that as helping Google, or diluting whatever strengths they feel they have as a result of keeping users in a kind of IM roach motel. '
After using Jabber and Gtalk - the user experince is great and certainly that 350 million IM user that Yahoo and MSFT have will begin to crumble if they (Yahoo and MSFT) adopt open source too !!
Oh well, 'nuff said.