To get work done, distributed and B2B teams need real-time collaboration tools that replicate the power and experience of face-to-face meetings and support "pervasive" interactions. Fortunately, real-time tools are getting better. Presence shows team members' context; instant messaging (IM) moves the dialog to mobile devices; Web conferencing allows video and document sharing; and telepresence delivers face-time quality. But which tools are best for your teams? A new analysis, based on the way your teams interact and how they are distributed, will help you choose the right tools and vendors.