There are more than eight million users of Research In Motion’s BlackBerry devices, which let users check their corporate e-mail, manage their calendars and access contact lists -- and have a way of quickly becoming a necessary lifeline for customers. If you’re a BlackBerry user, you understand.

RIM’s president and co-CEO Mike Lazaridis sat down with Network World Senior Editor Denise Pappalardo Tuesday at the FOSE IT-in-government trade show in Washington, D.C. Lazaridis -- who, of course, was tapping away on his BlackBerry before the interview got underway -- talked about how RIM is working toward adding more enterprise capabilities to its BlackBerry devices, how the company views Microsoft’s support of push e-mail, and how he feels about the device’s nicknames.

What is RIM doing to extend BlackBerry’s capabilities beyond e-mail for enterprise customers?

Sometimes it’s important to state the obvious, but we support the major e-mail platforms -- Exchange, Lotus Notes and GroupWise -- and have for years. We have an in-depth, broad understanding of how to implement these systems. But we did that years ago.

Since then we have been working with third-party software developers who have written applications for the BlackBerry system. There are more business-related wireless applications, especially push applications, for the BlackBerry platform than anything else. There are over 650 developers writing these applications, which include hundreds, for the BlackBerry installed base of 8 million users and growing.

You don’t have to get third-party middleware or another secure channel to support these applications. They have the same accredited security as the BlackBerry environment, and you can just plug in these applications. Users can even push Java apps directly to devices in the field. This makes BlackBerries highly valued in the Fortune 1000s around the world.

It seems like nearly all wireless service providers offer BlackBerries today. How many wireless service providers offer the device?

It’s available on 225 networks in over 100 countries.

How do you measure the success of your enterprise application development beyond e-mail? Can you break that down into percentage of revenue or traffic growth?

Over the last three years I think it has become very successful. Well over 70% of the installed base is passing data other than e-mail, calendar and contacts. A lot of companies have discovered the power of the push browser.