They currently don't sell a holster or a charging cradle for that case. They might eventually sell a holster but I wouldn't count on them selling a cradle. That isn't their thing.
If you absolutely need a holster, I hear that Seidio sells a holster that may work with it. I personally am using my Commuter case with a $9.00 walmart sideways belt clip holster. It is made by Fonegear. Magnetic closure, reasonably well constructed canvas/cordura material. Felt lined interior. And the magnetic closure holds the S2 in its commuter case quite firmly AND it puts it into sleep mode regardless of which way I put the phone in the case.
It isn't pretty but it will suffice until I get the Defender case/holster combo.
Edit: I added pics to show how easily the Commuter case fits into the generic phone hosters.
well, it isn't all that tough to take it out of the case. Just pop the plastic shell off and then peel it out of the rubber skin. But if you are doing that very often I can see that it will probably start to stretch the skin out of shape.