Hi teamkp,
You'll need to add the following to your Quick CSS or custom.css file and modify the width values:
First for its normal state:
.header_meta #s{ width: 121px; }
And for its active state:
.csstransitions .header_meta #s:hover, .header_meta #s:focus{width: 190px; }
.msie7 .csstransitions .header_meta #s:hover, .msie7 .header_meta #s:focus,
.msie8 .csstransitions .header_meta #s:hover, .msie8 .header_meta #s:focus{width: 121px; }
You can use the content slider shortcode in a text widget for a sidebar content slider.
No, there is no google widget available for inside the visual editor.
Regards,
Devin