Whenever I do a Webpost, if I want the page or image URL I have to open the web page and then copy from the right text box. This isn't too bad and it's far easier than what I was doing prior to Skitch.
However, it would save me more time and mental overload if I could just copy the URL from a dropdown in the Skitch application itself ("Copy image URL to clipboard"). It would remove a bunch of friction from this process.