maybe a stupid question but I'm wondering about the following.
Is there a way to somehow aggregate the RSS/Atom-feed of a blogs categories without knowing the exact categories. I mean I want to aggregate a bloggers categories automatically and show them on a webpage without any manual initervention. The RSS should tell me about new (sub)categories. Imagine a community of 20 that post to different and emerging categories. Wouldn't it be great to aggregate what's going on on a category basis.
Can you understand me?