I'm still using iView Media Pro 3.1.3 and it works fine on my MacPro with 10.5.6. It also imports Raw, DNG and JPEGs from my Canon G10 and 1Ds MKIII. However I've fully migrated to Lightroom because I like the whole idea of doing just about everything from one program. Also the image quality from it now is superb and the adjustments really comprehensive. Because Lightroom is quite complex it gets a bit of flack from a few users who seem to struggle with it but we find it brilliant to use and out of all the raw processors tried including Raw Developer, DPP, and Capture One, gives the best overall image quality on our Canon files.
Bridge is simply a file browser with sophisticated keyword and search functions but very nice to use. I would go to Lightroom rather than Bridge if you've been used to iView, but you will need to use all the free help videos on the web (there are loads) to get the most out of it otherwise you will be on to the Adobe Lightroom Forum asking lots of daft questions.
John