If you are truly desparately seeking keywords :
$seed=”test”;
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$html = file_get_contents("http://freekeywords.wordtracker.com/?seed=".urlencode($seed)."&suggest=Hit+Me&adult_filter=remove_dubious");
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if(!eregi("Apologies", $html)){
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preg_match_all("/remove_dubious\">(.+?)< \/a>/", $html, $keywords);
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foreach($keywords[1] as $keyword){
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echo $keyword."";
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}
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}
I’d use 7Search, you can’t scrape that one but it does have pretty good results for the american/english region. (compare it’s search volume estimate to google adwords, they match)