Take a look at this tutorial http://bavotasan.com/2009/simple-voting-for-wordpress-with-php-and-jquery/ and its follow up http://bavotasan.com/2011/a-better-voting-system-for-wordpress/
which shows a simple implementation of a vote like system.
Take a look at this tutorial http://bavotasan.com/2009/simple-voting-for-wordpress-with-php-and-jquery/ and its follow up http://bavotasan.com/2011/a-better-voting-system-for-wordpress/
which shows a simple implementation of a vote like system.