Continuing on recent discussions from WES, RIM has a bunch of clients for you and your Blackberry friends. Not all available yet, but Sametime has been for a while(I am updating my install doc for it, look for the post this week).
Go to this page for all the details and then get in on the notification or beta for each of the mobile clients.
1) Sametime - You always remember your first..and still advancing.
See this IBM PRESS Room Announcement:
The new BlackBerry Client for Lotus Sametime extends real-time collaboration from the desktop computer to the BlackBerry smartphone, including instant messaging (IM), presence awareness, contacts, broadcasts, file transfer, click-to-call and other features. Traditional landline phones become obsolete through the combination of voice-over-IP with presence awareness via IBM Lotus Sametime and corporate network and wireless routing with the BlackBerry® Bold® smartphone. In addition to IM, presence is seen throughout the smartphone applications. For example, a customer can use instant messaging within their calendar or an email to get an urgent answer in the moment without breaking the work flow. If instant messages aren't fast enough, the click-to-call feature is one button away.
2) Connections - The next generation BlackBerry Client for Lotus Connections, developed by RIM and available May 8!
3) Quickr - Coming soon? But not fast enough for me and my clients
4) Symphony - Coming soon?
Of course you need to move to BES 5.0 for some of these to work with all the benefits. We can help you if you need it.
By the way if you were looking to mobilize your applications and work force to leverage your investment in Lotus and RIM technology, let me know as I will be doing a LCTY event on this topic soon, look for slides.