I'm trying to build a sidebar that lists all categories and under each category would be the corresponding posts to that specific category.

For example:

[list]Cars -- (Category)
[list]porsche --(post)
ferrari--(post)
ford--(post)[/list:u]
Computers -- (Category)
[list]apple --(post)
dell --(post)
toshiba--(post)[/list:u][/list:u]

Anyone know the wp php to do that? Or where I might find it? I've thumbed through the codex and I just haven't been able to put it all together.

Thanks,

Brandon