haha...good job. I was going to sms you if you didn't respond here soon.
30 mins wont do much damage. If it were in there for hours and it had time to cool right through to the core there might have been.
Just keep an eye on it. If it looks like it's sweating still in a couple of days time (feels damp to the touch), maybe get some silicon sachets and pop them around it. They will absorb any residual moisture pretty quickly.