A quick tip which will help you to save pictures directly from the Twitter app for Blackberry.
Few days back Twitter updated its Twitter for Blackberry app. As expected, there were improvements in the app but one anticipated feature was still absent. That was to save the pictures appearing in twitter timeline.
However there is different approach to overcome this shortcoming. I use free Screen Grabber App. Whenever there is an interesting picture in my twitter timeline, I open in full screen, (simply by clicking on the thumbnail in the stream) and then I capture the screen with Screen Grabber App. The app is accessible anywhere with the press of menu (blackberry symbol) button.
You will need to negotiate with the resolution. But something is better than nothing.