I bought Domino 6.51, can I use Sametime without any cost ?
Subject: Notes 6.5 clients can use the IM capabilities within the Notes 6.5 client without additional cost.
The capabilities within the notes Client are not as complete as the full Sametime license, they do not include instant meeting support for example, but they are a great starting point and for free!
But you need Notes 6.5 client licenses not the server license to be entitled to use the Sametime IM capabilities in Notes.