[wp-hackers] WPMU: Create Custom Feed?

[Tom Belknap]

Hey everybody!

I'm using WPMU and want to allow users to get a custom feed that 
combines all the authors they like into a single channel.  For 
consistency's sake, I'd like to be able to query the info directly from 
the dB and then port the output through WP's existing feed functions.  
I'm having difficulty figuring out where to start with the second, feed 
portion of the process.  Could you briefly outline the feed process in 
WP, so I can at least get a sense of where I'd want to hook my functions?

Thanks very much!