Yes, I’ll put my money where my mouth is.

Naked—because you’re in control

$('.hastip').tooltipsy();
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Style it however you like, but I’ll keep it simple

$('.hastip').tooltipsy({
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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How about 10px below?

$('.hastip').tooltipsy({
    offset: [0, 10],
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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On the right?

$('.hastip').tooltipsy({
    offset: [10, 0],
    css: {
        'padding': '10px',
        'max-width': '100px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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On the left?

$('.hastip').tooltipsy({
    offset: [-10, 0],
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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Custom animation you say?

$('.hastip').tooltipsy({
    offset: [-10, 0],
    show: function (e, $el) {
        $el.css({
            'left': parseInt($el[0].style.left.replace(/[a-z]/g, '')) - 50 + 'px',
            'opacity': '0.0',
            'display': 'block'
        }).animate({
            'left': parseInt($el[0].style.left.replace(/[a-z]/g, '')) + 50 + 'px',
            'opacity': '1.0'
        }, 300);
    },
    hide: function (e, $el) {
        $el.slideUp(100);
    },
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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More extreme? How about falling from the sky

$('.hastip').tooltipsy({
    offset: [0, -1],
    show: function (e, $el) {
        var cur_top = parseInt($el[0].style.top.replace(/[a-z]/g, '')) + 'px'; 
        $el.css({
            'top': (window.pageYOffset - $el.outerHeight()) + 'px',
            'display': 'block'
        }).animate({
            'top': cur_top,
            'opacity': '1.0'
        }, 500, 'easeOutBounce').css('top', cur_top);
    },
    hide: function (e, $el) {
        $el.animate({
            'top': '+=200px',
            'opacity': '0.0'
        }, 200);
    },
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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Or align it to the cursor 10px below and to the right

$('.hastip').tooltipsy({
    alignTo: 'cursor',
    offset: [10, 10],
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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Can it be.... AJAXified?

$('.hastip').tooltipsy({
    content: function ($el, $tip) {
        $.get('api.php', function (data) {
            $tip.html(data);
        });
        return 'Fallback content';
    },
    css: {
        'padding': '10px',
        'max-width': '200px',
        'color': '#303030',
        'background-color': '#f5f5b5',
        'border': '1px solid #deca7e',
        '-moz-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        '-webkit-box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'box-shadow': '0 0 10px rgba(0, 0, 0, .5)',
        'text-shadow': 'none'
    }
});
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