If you don't mind me asking. Who pays for the bandwidth cost of running "giggr"? It doesn't look like you have any ads running. Or are you monetizing on it in some other way?
Even if millions of people decided to suddenly use it, the cost would be almost nothing.
I might even consider putting the free CloudFlare in front of it to ensure the cost is nothing (one static HTML file cached forever).
Heh, just looked at the source code again... it's a single request web page, not even an external CSS or JavaScript file.
You can't get cheaper really.