Updated 09/09/2011
1. Get and install Netbeans. You want the "All" version, the one version that support Java ME.
http://netbeans.org/downloads/
2. Get and install Blackberry Java Plug-in for Eclipse. You will need to create a developer account fuirst. The link "Download the BlackBerry Java Plug-in for Eclipse v1.3" simplifes installation by including the porpoer version of Eclipse with the BlackBerry plug-in pre-installed (you can install Eclipse and then add the BlackBerry plug-in, but depending on the version of the plug-in and the version of eclipse you use things may not work).
http://us.blackberry.com/developers/javaappdev/javaupdate.jsp
3. Get and install the Android SDK. Its best to install a second copy of Eclipse and add the Android plkug-in and tools to that.
http://developer.android.com/sdk/index.html