I was thinking to myself that this probably should have been one of my first posts, so I quickly made some glass orbs for you. What kind of Illustrator blog would this be without a free glass orb download? I guess it completely slipped my mind and I apologize, but I'm serious when I say that ANYONE can easily make these on their own in Illustrator. No clipping masks, just 4 shapes, 1 drop shadow, 1 feather, and 1 transparency mask. If you don't know what a transparency mask is, read this post on how to create a vector glass button in Illustrator, with detailed instructions. AI (including legacy), EPS, SVG and PNG formats available in the download.