How can I get a user's Google Buzz follower count? Can I use jQuery or something else?
if all you want is buzz follower count, you don't even need jQuery. Just use the JSONP support in the Buzz API, and call the followers endpoint...
<html>
<head>
<script>
function followerCount(response) {
alert(response.data.totalResults);
}
</script>
<script src="https://www.googleapis.com/buzz/v1/people/googlebuzz/@groups/@followers?alt=json&callback=followerCount&max-results=0"></script>
</head>
</html>