Because the Internet doesn't have it yet, here's an easy way to exclude a region from jQuery's popular Vector Maps plugin without excessive code;
onRegionOver:function(event, code, region){
if(code !== 'tx' && code !== 'hi' && code !== 'ca' && code !== 'ut') {
event.preventDefault();
document.body.style.cursor = "default";
} else {
document.body.style.cursor = "pointer";
}
}