Think Lotus Notes is just about email?  If so, you are sadly mistaken.
In a recent blog post by Lotus Evangelist, it states all the multiple uses for Lotus Notes.  Some of them are listed below:

A widget player
Instant Messaging client
Rebate Tracker
Grocery List Minder
Expense Reports
Mileage tracking
Password Logging
Photo storage
Stores tax returns
Phone Call Logs

If that weren’t enough, it will also [...]

Wondering how you can install BlackBerry Enterprise Server on a Lotus Notes Domino system?  Well, Michael Kinder recently wrote of eight great practices that will help to keep your BlackBerry Enterprise Server and Lotus Notes Domino system running smoothly.

Is the Domino server running the BlackBerry Enterprise Server software either in the LocalDomainServers group or another part [...]