I'm certainly not the first to do this, but I thought I'd share my little project:
This is a remote powered focus motor that I rigged up for my Celestron 6 SE. I thought the prices out there for a model specific powered focus motor were ridiculous (about $200). I bought this motor on Amazon for $80. I think it was originally designed for an Orion telescope, but as you can see in my photos and video, I adapted it to the Celestron pretty easily. Works great and I'm excited to get some viewing tonight without the constant vibration issues I get when trying to focus by hand.