On the btcinfo page you can check Wallet Balance, Amount Sent & Received, see your QR-Code and you can see a Widget with Code to add a small widget to your other websites.
Check your own wallet - Just enter your Bitcoin Public Wallet into the Form and click "Check".
This site is builded with the Bootstrap 3 Framework from Twitter So it's very Easy to Change the look of your site.
On the Settingspage in the Admin-Panel you can easy Change to 10 different predesigned Themes
But you can create new Themes. Just put your new Skin in the Directory ../static/css/skins - And change the name of your skin on the Settingspage in the Admin-Panel.