Multiple Feeds in One Installation

Hi,

I’m doing a site redesign, and want to use WordPress if what I want to do is possible, because I’m very familiar with it. I have multiple podcasts and blogs, and want to do something along these lines:

Have a homepage with all the site’s posts (podcasts, blog posts, etc.) in one unified feed.
Have a page with a list of podcasts that link to podcast feeds, like the main blog on the page but only that podcast feed.
Integrate login with phpBB3.
Do it all within one WordPress installation because there are multiple authors, and it makes posting and administrating far easier.

Up until now I haven’t been able to do this without just having multiple independent WordPress installations linking to each other, but I would like to have it all in one.