i did something similar with some radio buttons and a special taxonomy. i worked almost exclusively from the following 2 tutorials:
http://shibashake.com/wordpress-theme/expand-the-wordpress-quick-edit-menu
http://scribu.net/wordpress/sortable-taxonomy-columns.html
though i was working with a taxonomy, the scribu tutorial actually links to another scribu tutorial on sorting by meta, which is more in-line w/ the OP’s question:
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