For planets, none really. Just a 1.25" adapter (nosepiece) and a UV/IR cut filter, some capture software such as K3CCDTools...a laptop to capture onto and Registax to process the AVI video files you've captured.
For Deep Sky Objects (DSOs)...yes, you'll need a modded (long exposure) ToUcam.
You'll also need some kind of tracking platform or motorised mount.