Chrome only: It's unofficial, and it only works when you're looking at text, PDF or .doc files in your browser. But you're a Mac or Linux Chrome user intrigued by the Windows and Android/iPhone print possibilities, this extension is for you.
When you're looking at a .txt file, PDF, or .doc file in your browser, you'll see the Cloud Print extension's icon in your address bar, on the far right. Click it, and you'll see the list of printers set up through the Windows printer you (assumedly) have attached to your printer. We've previously detailed the Cloud Print setup process, and it applies here, too — just substitute your Chrome button for a smartphone.
It is, then, a limited appeal — those with non-Windows Chrome browsers who want to print remotely to a Windows machine that's hooked up to a printer. But it's neat to see unofficial Cloud Print hacks coming along, because it portends great things for the future. "Print Using Google Cloud Print" is a free download for Chrome browsers only.