http://www.w3.org/TR/xml-stylesheet/

As far as dealing with ugly ones, the user should be able to set a single custom stylesheet in PF. Then, should have the option to "turn-off" the publisher's stylesheet in any given feed, which will then fall back to the user's cusom sheet (or the default if no custom was set). It seems like the toggle for this should have a keyboard shortcut to toggle the current feed -- maybe cmd-opt-S or something?

Maybe also have a global "Use publisher's style sheet if provided" preference that defaults to "on".

I wish I could play with this myself Waiting not-so-patiently over here.

What I wanted to see was the ability to easily set up those 500 feeds (imported from wherever) into those 5 or 10 different categories so that when you read them and when you search their content, you have a little more context to what you are doing. The filtering system in PF is very good, but there are some things (ie: drag feed to a folder and have it autmagically be added to that folder via filterize) which would make this organization even better.

You aren't going to use the app the same way as me, or $otherdude, or $otherotherdude. Best thing you can do is identify the "core sets" of uses that go on and ensure the app works well for most major cases. And I think that PF is well on it's way, or at least, to satisfy my uses

The other in-escapable fact is that NNW is the defacto standard right now (IMHO) and most people grew up on doing RSS that way, so they are used to it.