I'm working on building the hacks section of the web site here. I think this will be a great resource for the WP community and I'm looking for some help with ideas for what categories would make sense.
Here is a start:
CSS Skins (blog)
CSS Skins (admin pages)
Multi-media (photos, audio blogging, etc.)
Referers (is this enough to be a category? it could be I think)
Accessibility (my mobile version hack would go here I think)
I'm sure I'm missing some and perhaps some of these aren't right. Please add your suggestions, thanks!