QRer - quick URL to QR code

I made this little tool the other week: it's a simple URL to QR code generator that uses AJAX so it's even zippier. Check it out here: http://qrer-snacsnoc.dotcloud.com

It uses the PHP QR Code library to generate the QR codes. I set it up so it caches URLs that have already been generated which make it faster to deliver the image.