I've just started using Lightroom and i think it's fantastic. It allows you to import your images, catalogue them, make edits and export them, all in one application. It doesn't have the scope of image editing possibilities that Photoshop does, but its brilliant for organising all my files and streamlining my workflow, which was fairly non-existent before. As far as i know you can do a lot of the same stuff as lightroom with Bridge and Photoshop (and a lot more), but with Lightroom it's all in one package, and it has been pretty easy to learn to use so far. I think you can get a free trial of lightroom, so download it and have a go!