WordPress is awesomely flexible and allows creating custom post types and taxonomies.
If you happen to need to display your custom Taxonomy Terms in a nice dropdown here is how to do it.

[code]
<?php

echo wp_dropdown_categories(array(
'name' => 'my_input_name',
'show_option_none' => 'Select My Custom Taxonomy',
'show_count' => 0,
'orderby' => 'name',
'hierarchical' => 1,
'hide_empty' => 0, // i.e. do not hide cats that don't have items
'taxonomy' => 'my_custom_tax', // whatever you've used in register_taxonomy()...
'echo' => 0, // return the string
));
?>
[/code]

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