I have not been using Evernote consistently on my BlackBerry for one main reason. It did not let you take notes when you did not have a network connection. It was an annoying restriction that made taking notes on the NYC subway impossible so I resorted to the native notepad. Adam @CrackBerry noticed that Evernote has put out a new beta of their app that adds offline notes to the BlackBerry smartphone app along with a few other bug fixes.
This update lets you now load the app without waiting for a connection and view your notes when your cached notes with no connection. The first connection will sync the majority of the info to your SD card which may take some time the first sync so do it over Wi-Fi. Notes with a * by them are stored locally.
Check out the beta v3.3.333 of Evernote on their forums. Hopefully this goes gold soon!