IBM LS7.5 - Officially interoperable with Gtalk and Yahoo

This morning, I saw an update on the Google blog which mainly discussed the interoperability between Gtalk and IBM Lotus Sametime 7.5. I immediately went to the IBM official website to check it out, and found that IBM LS7.5 not only achieved interoperability with Gtalk, but also with Yahoo! It's uncertain whether this move will increase the number of Gtalk users.