[wp-hackers] Select Menu to filter results by Custom Values

[Kelter-BadCat Design]

Hi,

I'm trying to get WordPress to return a dropdown 
list (a SELECT MENU - similar to how we use 
"wp_dropdown_categories") of VALUES for a 
particular custom KEY that I've entered in the 
Custom Field.

I'd like to use this dropdown list as a way to 
filter the results (a listing of posts) shown on 
the page.

I tried approaching it like thisŠ

< ?php echo get_post_meta($post->ID, 'time', $single = true); ? >

or

< ?php $key="time"; echo get_post_meta($post->ID, $time, $single = false); ? >

Whereas "time" is the Custom KEY. Additionally I 
need the VALUES in a Select Menu so I can run the 
filter via a form element.

Can anyone point me to any examples or possibly 
something on the WP Codex? Seems like all 
functions try to point me to "Post specific" 
solutions.

thanks!