I know this is the opposite of what you’re wanting to do but here is a cool add on for Firefox, "mobile barcoder". It allows you to go to a web page on your desktop hover your mouse over a black box at the bottom right of your screen and it puts a barcode up for you to scan with your phone. After scanning you can load the page with out having to type any thing in.
Yeah, there's a QR Code Chrome extension which does the same thing....I'm sure that Google has a 'browser tie-in' in the works though. Does anyone use Dolphin Browser...I noticed the new update has a Google Bookmarks sync....but of course Google Bookmarks can't be used with Chrome...no 'Google Toolbar'