I have created what's known as a Squidoo Lens that covers my favourite Online PR tools that I like using for tracking blogs, podcasts, comments, etc. It's not exhaustive, but it covers my faves of the moment and follows the M.A.I.L. (Monitor, Analyze, Interact, Lead) acronym I've been using to introduce clients and colleagues to the world of social media.
If you have any other tools that you absolutely can't live without, drop me a note in the comments.
(I just noticed I left off iTunes as my podcast directory of choice...I'll have to add that one.)