I have one from Bontrager that I bought at my LBS last month. I like it a lot. I got it as a handy place to hold my camera when I bring it on rides, and when I don't have the camera (which is most of the time) I use it for other things that I am likely to reach for during a ride, like my cell phone and a pocket pack of tissues.

Mine has a mesh cover so I keep the cell phone in a ziploc sandwich bag to protect it from rain, dirt etc.