Does my page look big in this?
DMPLBIT is a little proxy that shows you what a site looks like if you access it with mobile headers and then show it in a small browser window on your desktop. Once the little window is open, requests from it are routed via DMPLBIT which requests the page with the HTTP headers (User-Agent, Accept etc.) from the device you choose.
For now, a wide choice of W3C DDC and Nokia N73 headers to choose from.