I went with Hunter Douglas. They've got a motorized system called PowerRise that is battery operated (the reason I went with it - no wires/retrofitting). The PowerRise shades are controlled by RF transmitter. They've also got a little device the Platinum RF Module (or something like that). It's a little dongle that plugs into a standard switched outlet. When the outlet has power, the shades rise; when it's off, they lower. I plugged the module into a Lutron lamp module which is then plugged into an outlet. I've got my Lutron system, which includes a bunch of lights and the one set of 4 shades, programmed to do different things at different times. I actually don't have my shades set to rise or lower at a particular time, but instead have them on various event buttons. So, for example, I've got a button called "Night". I hit that button on a Lutron keypad, or my iPad or my HAI OmniTouch keypad and the interior lights go out, certain exterior lights go on and the shades lower. When I hit the "Morning" button, the shades rise, the exterior lights go off and certain interior lights come on. I could do the shades on the Lutron clock but I like them more "manual". The nice thing about the Hunter Douglas system is that you've got more options on the shades, it can be powered by battery and it's cheaper than Sivoia. http://www.hunterdouglas.com/product-option.jsp?id=164
PS. You obviously wouldn't have to control the HD system via Lutron. Anything that can controll a standard outlet would work, including a good old timer.